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Classic Large Rock Tumbler with Abrasives

Budding lapidarians will lap up this rock polishing kit which is so complete it even contains some rocks. The polishing tumbler has a (3 lb. /1 qt.) fifteen sided rubber barrel and is driven by a 115 VAC motor. Overall dimensions are 6" x 6" x 7-1/2" high. In addition to the tumbler, the kit includes an assortment of jewelry findings, a #300 4-Step Grit Pack and a detailed manual giving you easy to follow instructions. But don't think of it only as useful for jewelry making. As a hobby, our Uncle George for many years collected and polished a wide variety of rocks which he found interesting and made beautiful in and of themselves. The #300 4-Step Grit Pack is available separately, for when your grit has run low, and includes 4oz. coarse, 4oz fine, 2oz. prepolish and 2oz polish grits, and we also have spare retaining rings available for the barrel.

Please Note: Your entire order will ship standard ground when purchasing this item. Contact us for expedited shipping information. Thanks!

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THUMLER'S ROCK TUMBLER W/ABRASIVES

Classic Large Rock Tumbler with Abrasives

Budding lapidarians will lap up this rock polishing kit which is so complete it even contains some rocks. The polishing tumbler has a (3 lb. /1 qt.) fifteen sided rubber barrel and is driven by a 115 VAC motor. Overall dimensions are 6" x 6" x 7-1/2" high. In addition to the tumbler, the kit includes an assortment of jewelry findings, a #300 4-Step Grit Pack and a detailed manual giving you easy to follow instructions. But don't think of it only as useful for jewelry making. As a hobby, our Uncle George for many years collected and polished a wide variety of rocks which he found interesting and made beautiful in and of themselves. The #300 4-Step Grit Pack is available separately, for when your grit has run low, and includes 4oz. coarse, 4oz fine, 2oz. prepolish and 2oz polish grits, and we also have spare retaining rings available for the barrel.

Please Note: Your entire order will ship standard ground when purchasing this item. Contact us for expedited shipping information. Thanks!

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$109.50 EACH

How Does It Work?

Why does it do that? Develop an elemental understanding of magnetism, electromagnetism, electrochemistry, radio, thermodynamics, light and optics. Simon Quellen Field's 228-page paperback, Gonzo Gizmos, Projects & Devices to Channel your Inner Geek explains processes, equipment and scientific terms -- and then, for starters, tells you things like how to make a rotary steam engine in 15 minutes from a soda can, a candle and a few scraps of rubber tubing. It's the favorite of our resident geeks -- but not for kids unless they're working with an adult. That would be a mature adult. An insured, mature adult.

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GONZO GIZMOS BOOK

How Does It Work?

Why does it do that? Develop an elemental understanding of magnetism, electromagnetism, electrochemistry, radio, thermodynamics, light and optics. Simon Quellen Field's 228-page paperback, Gonzo Gizmos, Projects & Devices to Channel your Inner Geek explains processes, equipment and scientific terms -- and then, for starters, tells you things like how to make a rotary steam engine in 15 minutes from a soda can, a candle and a few scraps of rubber tubing. It's the favorite of our resident geeks -- but not for kids unless they're working with an adult. That would be a mature adult. An insured, mature adult.

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$16.95 EACH

Poof-You’re A Magician!

You can’t start fooling people too early. This box of tricks is for budding magicians, and includes the props and instructions for (77) tricks. Includes a magic wand, without which you can’t be a magician, plus assorted cups, balls, cards and coin-trick frames. You add a few things like money, a handkerchief, gullible friends, etc. For ages 6+.

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MAGIC SET WITH 77 TRICKS

Poof-You’re A Magician!

You can’t start fooling people too early. This box of tricks is for budding magicians, and includes the props and instructions for (77) tricks. Includes a magic wand, without which you can’t be a magician, plus assorted cups, balls, cards and coin-trick frames. You add a few things like money, a handkerchief, gullible friends, etc. For ages 6+.

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$14.95 EACH

Begin Electronics!

Cool kit to introduce the beginner (age 10+) to the fabulous world of electronics. You will learn the basics of putting together circuits through over 50 projects building actual devices like an alarm, a radio, a metal detector and much more. The simple but complete instructions explain voltage, current resistance etc. This kit from Elenco is a giant "breadboard" with wires that can be connected to form the circuits as explained in the instructions…and all without soldering! A fabulous educational item at a fabulous surplus price!! For ages 10+.

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ELECTRONIC PLAYGROUND EDUCATIONAL KIT

Begin Electronics!

Cool kit to introduce the beginner (age 10+) to the fabulous world of electronics. You will learn the basics of putting together circuits through over 50 projects building actual devices like an alarm, a radio, a metal detector and much more. The simple but complete instructions explain voltage, current resistance etc. This kit from Elenco is a giant "breadboard" with wires that can be connected to form the circuits as explained in the instructions…and all without soldering! A fabulous educational item at a fabulous surplus price!! For ages 10+.

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$26.50 EACH

MOUNT THAT SPECIMEN

Cases for mounting butterflies, bugs, rocks, fossils or any other three dimensional collectibles. Known as Riker mounts, these are sturdy cardboard boxes 7/8" deep, with glass glued into the front cover for viewing. They are filled with a fairly firm, white, expanded, synthetic, cotton–like material. The cushiony filler holds the three–dimensional viewee in place without pins or glue. Very handy for the proud trophy hunter. Our smaller is 8” x 12” and the larger 12” x 16–1/2”.

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12" X 16" RIKER MOUNT

MOUNT THAT SPECIMEN

Cases for mounting butterflies, bugs, rocks, fossils or any other three dimensional collectibles. Known as Riker mounts, these are sturdy cardboard boxes 7/8" deep, with glass glued into the front cover for viewing. They are filled with a fairly firm, white, expanded, synthetic, cotton–like material. The cushiony filler holds the three–dimensional viewee in place without pins or glue. Very handy for the proud trophy hunter. Our smaller is 8” x 12” and the larger 12” x 16–1/2”.

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My First Strobe Kit

For tyro electronics wizards: build your own dual white-LED strobe light. You'll need a 9V battery, solder and a soldering iron. Features a speed switch and rate control knob, and will oscillate between once and a seizure-inducing 60X per second. Draws 40mA. Ages 10+, as some soldering is required.

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STROBOSCOPE

My First Strobe Kit

For tyro electronics wizards: build your own dual white-LED strobe light. You'll need a 9V battery, solder and a soldering iron. Features a speed switch and rate control knob, and will oscillate between once and a seizure-inducing 60X per second. Draws 40mA. Ages 10+, as some soldering is required.

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$10.95 EACH

Rocks and Roll

Turn rocks into jewelry, a few pieces at a time. Our small Rock Tumbler Geology Kit (1lb capacity) plugs into the wall and rolls those rocks around until they're all shiny and beautiful. Includes coarse and fine grinding powders, fine and finer polishing powders, 4 oz of practice gemstone rocks, a geology poster, glue, and mounting hardware to make a keychain, adjustable rings, earrings and other items. Can be set to turn from (1) to (7) days (rocks are hard, which is why they're called rocks). Measures approx 9" x 11" x 6" high overall, including the plastic dome to reduce the sound of the operation. For 10-year-olds and up.

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HOBBYIST ROCK TUMBLER

Rocks and Roll

Turn rocks into jewelry, a few pieces at a time. Our small Rock Tumbler Geology Kit (1lb capacity) plugs into the wall and rolls those rocks around until they're all shiny and beautiful. Includes coarse and fine grinding powders, fine and finer polishing powders, 4 oz of practice gemstone rocks, a geology poster, glue, and mounting hardware to make a keychain, adjustable rings, earrings and other items. Can be set to turn from (1) to (7) days (rocks are hard, which is why they're called rocks). Measures approx 9" x 11" x 6" high overall, including the plastic dome to reduce the sound of the operation. For 10-year-olds and up.

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$36.50 EACH

Make Things Crystal Translucent

Making stuff crystal clear is boring. Grow your own red, blue or purple crystals with these amazing Magical Crystal growing kits. You get approx 4 oz of mono-ammonium crystal, a 2-3/8" dia concave base, some appropriate food coloring flakes, a 3-3/4" x 2-3/4" dia clear plastic container, mixing stick and instructions. Ages 8+.

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PURPLE CRYSTAL GROWING KIT

Make Things Crystal Translucent

Making stuff crystal clear is boring. Grow your own red, blue or purple crystals with these amazing Magical Crystal growing kits. You get approx 4 oz of mono-ammonium crystal, a 2-3/8" dia concave base, some appropriate food coloring flakes, a 3-3/4" x 2-3/4" dia clear plastic container, mixing stick and instructions. Ages 8+.

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Cooler Than Monkeys

Triops: way cooler, bigger and more active than sea monkeys. They're dinosaur shrimp, leftovers from some 200 million years ago. Don't eat them; just grow them and enjoy this bizarre & ancient display of nature! In the kit you get a kidney-shaped tank 2-3/8" tall x 8-1/2"x 5-3/4", a very informative instruction booklet, and a packet full of triops eggs and food. In the starter pack/refill pack you get tripos eggs, food, conditioner and directions. Add the eggs to water and watch them go; they'll hatch in a day and reach 1" to 2" or more in a few weeks. Really easy to do, and really cool too.

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PREHISTORIC TRIOPS KIT

Cooler Than Monkeys

Triops: way cooler, bigger and more active than sea monkeys. They're dinosaur shrimp, leftovers from some 200 million years ago. Don't eat them; just grow them and enjoy this bizarre & ancient display of nature! In the kit you get a kidney-shaped tank 2-3/8" tall x 8-1/2"x 5-3/4", a very informative instruction booklet, and a packet full of triops eggs and food. In the starter pack/refill pack you get tripos eggs, food, conditioner and directions. Add the eggs to water and watch them go; they'll hatch in a day and reach 1" to 2" or more in a few weeks. Really easy to do, and really cool too.

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$11.95 EACH

Leo Vinci Kits

Return with us now to those thrilling days of the 15th century, when Leonardo was designing stuff you wouldn't have thought of even if you'd paid attention in class and applied yourself. You choose from these wooden models of his genius designs. His unrealized aerial screw (think helicopter) stands approx 15" tall on a 9" square base and has a canvas canopy. Includes a 12-page manual and all the parts. For ages 9+. You’ll need glue, scissors and a ruler. The trebuchet (think catapult) is based on his original 1482 design, stands approx 24" tall x 12-3/4" x 4-1/2" and comes with all the parts, including a clay ball to launch at your favorite model castle, or your sister. Includes an 8-page instruction book and is for ages 12+. Bring glue, scissors, a ruler and some small clamps.Great resources for STEM activities.

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DAVINCI TREBUCHET KIT

Leo Vinci Kits

Return with us now to those thrilling days of the 15th century, when Leonardo was designing stuff you wouldn't have thought of even if you'd paid attention in class and applied yourself. You choose from these wooden models of his genius designs. His unrealized aerial screw (think helicopter) stands approx 15" tall on a 9" square base and has a canvas canopy. Includes a 12-page manual and all the parts. For ages 9+. You’ll need glue, scissors and a ruler. The trebuchet (think catapult) is based on his original 1482 design, stands approx 24" tall x 12-3/4" x 4-1/2" and comes with all the parts, including a clay ball to launch at your favorite model castle, or your sister. Includes an 8-page instruction book and is for ages 12+. Bring glue, scissors, a ruler and some small clamps.Great resources for STEM activities.

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$19.95 EACH

Box-O-Bubbles

Including bubbles as big as your grandmother. You get 2 oz of fluid; (4) straws; a mouthpiece; cubical, pyramid, star and round frames, 108" of yarn (for the bubbe-sized bubble); a tray and instructions for (11) kinds of bubble activities. For ages 5 and up.

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BUBBLE SCIENCE ACTIVITIES KIT

Box-O-Bubbles

Including bubbles as big as your grandmother. You get 2 oz of fluid; (4) straws; a mouthpiece; cubical, pyramid, star and round frames, 108" of yarn (for the bubbe-sized bubble); a tray and instructions for (11) kinds of bubble activities. For ages 5 and up.

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$14.95 EACH

BUILD IT, DOWNLOAD IT, PLAY IT, CODE IT!

His name is Tobbie II, and although he stands only about 6-7/8” tall, he does sport (6) actual feet, which is why he has such an agile, 360-degree, free-rotation body. You build him yourself (easy-peasy if you’re over 10) and program him on your computer, tablet or smartphone. Comes out of the box pre-programmed with Assembly Checker and Program #1, so the fun starts right away. Use him as a light tracker or thermometer, or to play rock-paper-scissors or bowling, or as a notice board, calculator or compass, or as a pet who will follow you. He’ll do other things, too. Includes a 36-page manual, and all you add is a quartet of “AAA” batteries and some common hand tools.

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TOBBIE II DIY CODING ROBOT KIT

BUILD IT, DOWNLOAD IT, PLAY IT, CODE IT!

His name is Tobbie II, and although he stands only about 6-7/8” tall, he does sport (6) actual feet, which is why he has such an agile, 360-degree, free-rotation body. You build him yourself (easy-peasy if you’re over 10) and program him on your computer, tablet or smartphone. Comes out of the box pre-programmed with Assembly Checker and Program #1, so the fun starts right away. Use him as a light tracker or thermometer, or to play rock-paper-scissors or bowling, or as a notice board, calculator or compass, or as a pet who will follow you. He’ll do other things, too. Includes a 36-page manual, and all you add is a quartet of “AAA” batteries and some common hand tools.

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$72.95 EACH
$77.95
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Make Your Own Weather

Budding meteorologists will love this Weather Science kit from Green Science. Includes experiments with lightning, static electricity, cloud-making, greenhouse effect, water cycles and acid rain. Comes with thermometers and holders, a balloon, seed tray, pH paper, and sundry plastic instruments. You add a few common household items.

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WEATHER SCIENCE KIT

Make Your Own Weather

Budding meteorologists will love this Weather Science kit from Green Science. Includes experiments with lightning, static electricity, cloud-making, greenhouse effect, water cycles and acid rain. Comes with thermometers and holders, a balloon, seed tray, pH paper, and sundry plastic instruments. You add a few common household items.

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$13.95 EACH

We're Anti-Gravity

In the mood for a little light levitation? Try this magnet-based kit from KidzLabs® and make a pencil float in mid-air or tell your fortune, all through the captivating power of magnets. You can even build a mag-lev robot, and who doesn't want one of those? The (7) projects are based on the (7) plastic-coated, 1-5/16" dia bored disc magnets and assorted other parts. Projects include anti-gravity sculpture, floating spinner, magnetic compass, spring and weight scale, propelling machine and a mag-lev transporter.

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MAGNET LEVITATION KIT

We're Anti-Gravity

In the mood for a little light levitation? Try this magnet-based kit from KidzLabs® and make a pencil float in mid-air or tell your fortune, all through the captivating power of magnets. You can even build a mag-lev robot, and who doesn't want one of those? The (7) projects are based on the (7) plastic-coated, 1-5/16" dia bored disc magnets and assorted other parts. Projects include anti-gravity sculpture, floating spinner, magnetic compass, spring and weight scale, propelling machine and a mag-lev transporter.

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$19.95 EACH

Wheels Within Wheels

Nice little pulley unit kit includes (1) pulley each at 50, 30, 25 and 20mm and (3) pulleys at 11mm, plus myriad bushings, a 3VDC motor, (2) belts and a belt guide, base, mounts and assorted hardware. Includes graphic assembly instructions, plus a couple of rudimentary drawings with suggested projects. It's a mechanical science project waiting for a home.

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PULLEY KIT

Wheels Within Wheels

Nice little pulley unit kit includes (1) pulley each at 50, 30, 25 and 20mm and (3) pulleys at 11mm, plus myriad bushings, a 3VDC motor, (2) belts and a belt guide, base, mounts and assorted hardware. Includes graphic assembly instructions, plus a couple of rudimentary drawings with suggested projects. It's a mechanical science project waiting for a home.

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$12.95 EACH

KEEP YOUR ANTS DOWN ON THE FARM

A Classic 6" x 8-1/2" x 3/8" Ant Farm. The ants will live between two parallel sheets of clear plastic and you will be able to watch them build their tunnels and chambers. Complete with sand and instruction booklet on the care, feeding watering and watching of your pet ants. Stands upright on its own base and includes an escape proof cover. Assuming you want live pets, you just order them online using the included code and weather permitting, the ant man will ship a small vial of the little critters straight to you. Comes with clear plastic tubing to create your own runways or buy multiples and connect them for your very own ant city. 

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CLASSIC ANT FARM

KEEP YOUR ANTS DOWN ON THE FARM

A Classic 6" x 8-1/2" x 3/8" Ant Farm. The ants will live between two parallel sheets of clear plastic and you will be able to watch them build their tunnels and chambers. Complete with sand and instruction booklet on the care, feeding watering and watching of your pet ants. Stands upright on its own base and includes an escape proof cover. Assuming you want live pets, you just order them online using the included code and weather permitting, the ant man will ship a small vial of the little critters straight to you. Comes with clear plastic tubing to create your own runways or buy multiples and connect them for your very own ant city. 

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$15.95 EACH

If Vercingetorix Had Had This Kit…

...he might never have been strangled. Catapults & Crossbows is our new favorite kit for explaining the physics of gunpowder-free projectiles. Includes a 32-page instruction book and all the parts you need to build (5) different crossbows and (5) different catapults and trebuchets with modular pieces and pins. Don’t try to defeat a Caesar without it. From Thames & Kosmos. For ages 8+.

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THAMES & KOSMOS CATAPULTS & CROSSBOWS KIT

If Vercingetorix Had Had This Kit…

...he might never have been strangled. Catapults & Crossbows is our new favorite kit for explaining the physics of gunpowder-free projectiles. Includes a 32-page instruction book and all the parts you need to build (5) different crossbows and (5) different catapults and trebuchets with modular pieces and pins. Don’t try to defeat a Caesar without it. From Thames & Kosmos. For ages 8+.

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$24.95 EACH

Is That A Scotsman In Your Pocket?

Our electronic MadLab bagpipe kit will slip into your shirt pocket or sporran. No plaid lower garments required, and, as usual, undergarments are up to you. This nice starter electronics kit has a transistor-based oscillator and 8-position stylus-activated “keyboard.” Output is via a piezo disc. Minimal soldering skills needed, and assembly should take under an hour. Add a 9V battery for power and you’ll be thrown out of class, or recruited into battle, within the first six notes. Ages 10+.

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ELECTRONIC POCKET BAGPIPES

Is That A Scotsman In Your Pocket?

Our electronic MadLab bagpipe kit will slip into your shirt pocket or sporran. No plaid lower garments required, and, as usual, undergarments are up to you. This nice starter electronics kit has a transistor-based oscillator and 8-position stylus-activated “keyboard.” Output is via a piezo disc. Minimal soldering skills needed, and assembly should take under an hour. Add a 9V battery for power and you’ll be thrown out of class, or recruited into battle, within the first six notes. Ages 10+.

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$15.50 EACH

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