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Build Your Own Crystal Radio
A good basic kit with everything you need to build a very simple crystal radio. This is not hi-tech hi-fi. Geared for ages eight and up, it is a complete kit with wonderfully straight forward instructions which walk the experimenter through hooking up tuning needle, crystal diode, and earphone, and experimenting to find useful antennas. (Sorry wire coil is already wound.) Excellent education, recreation and discovery device all at the same time. A simple kit with hours of fun in it.
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88028 CRYSTAL RADIO KIT |
Small Rock Polishing Kit
A rock polishing kit, complete with semi-precious stones, three grades of grit, polish, an assortment of jewelry mountings and a small container of glue. The 110 VAC motor driven barrel has about a 1/2 lb capacity. About 9" x 5" x 7" high overall.
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88742 SMALL ROCK POLISHING KIT |
Otto's Oughta Run An Auto
Build your own working four-stroke engine! In this simplified, battery-driven version of Nikolaus Otto's 1867 four-stroke engine, the pistons and crankshaft move, the fan blade spins, and the spark plugs light up to simulate timing. This Smithsonian kit, with over (100) plastic pieces, includes a small DC motor to run the engine, and an excellent 40pp instruction manual. You provide (2) "AA" batteries and an interested person eight years of age or older.
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93072 MOTOR WORKS |
Intruder! Intruder!
Someone has entered your room! You're not in there to catch them, but the infrared light barrier you built has sounded the alarm! This Velleman MK120 mini kit includes all the components for both the 2" x 1-1/2" transmitter and 4" x 2" receiver (sizes approximate). The transmitter and receiver can be installed up to 12-1/2 ft apart. Breaking the infrared beam between them sets off an 85 dB alarm and lights an LED. Includes instructions, a schematic, 9-volt battery holders and adapter jacks (but not the solder, soldering gun, or the 2 batteries or adapters).
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92316 INFRARED ALARM KIT |
Power Potting
Get the real feel of being a potter! Throw a pot on this 5-1/2" dia wheel with the 11" x 9-3/4" x 2-3/4" base. Granted, you won't throw it far since this is a light-duty wheel, but it's a good way for beginners and kids to check out their dexterity. The all-in-one kit includes a foot pedal to control the speed, (2) bags of air-dry clay (no kiln required), (6) small pots of paint, and brushes, shaping tools and other supplies. Requires only (4) "D" batteries (not included) to deliver tactile, artistic, messy fun!
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92471 POTTERY WHEEL |
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Soda Bottle Derby!
A boy, an empty plastic soda bottle, and a solar boat kit -- it takes you back to Great Grandpa making his own crystal radio. The Solar Bottle Boats™ kit comes with a 1.5-volt, 1/2-watt solar panel 4-1/4" x 1-5/8", a hobby motor, (2) types of propellers, assorted tape, tubing and wire nuts, and instructions for (3) different designs. You supply the empty soda pop bottles and a body of water.
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92345 SOLAR BOAT KIT |
Agate Slab
Polished slice through a piece of agate. It will show concentric rings reminiscent of a tree trunk in colors ranging from milky white to blue to yellow to brown. Each sample is unique! Roughly 1/8" thick x up to 3" dia. Lovely.
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88584 AGATE SLAB |
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Five Fossils, No Waiting
Makes us nuts, sitting around waiting fifty, sixty thousand years for the fossils to harden. So we got this clear plastic fossil mold from Roylco®, 8-1/2" x 10-1/2" OA, to make replicas of ammonite, chirostenotes' claw, trilobite, king crab and gryodus. You can create detailed plaster-of-Paris models 3" to 3-1/2" dia, but we'd give the kids a break and use chocolate or Jell-O", because nothing makes paleontology more fun than eating the fossil record.
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92652 FOSSIL MOLDS |
Electric Motor and Magnet Kits
A trio of the best science education kits we have seen dealing with electricity, magnetism, motors and generators. The 44 page instruction booklets are educational and complete; state problem, approach and explain what is happening for a series of projects of graded difficulty. The Motor/Generator kit includes several introductory experiments on magnetism as well as six complete motor generator projects. The Electromagnet kit provides experiments including the building of an electromagnet, a doorbell chime, a telegraph, a relay and an electric catapult. The Levitation Set experiments with magnetic fields, gravity, and equilibrium; plus everything you need to build a magnetic levitation train! All are complete except for batteries. Strongly recommended for their quality, the accuracy of their science and the interest they will sustain. Ages 10-18.
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89339 ELECTROMAGNET KIT | |
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89714 MAGNET LEVITATION KIT | |
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89338 MOTOR/GENERATOR KIT |
Gear Up And Go
This nice One Touch gear-box kit from OWI® features (6) gear ratios (6.8:1, 17.68:1, 45.97:1, 119.52:1, 310.74:1, and 807.93:1) in (2) switchable modes, plus a 3VDC motor so you can use the finished product to drive pulleys, wheels, fans, science projects, or maybe a toy car. Requires only regular household tools to assemble it, and has (4) adjustable mounting brackets. Overall size when finished is 2-7/8" x 3-1/2" x 5-8" high.
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93460 GEAR BOX KIT |
Grow Your Own Butterflies!!!
More exciting than an ant colony! Prettier than tadpoles and frogs. The principle of this kit is the same as both. Buy the kit which consists of a growing/viewing chamber, food, and instructions. Send in the coupon (plus a small shipping charge) and receive (5) larvae and their food. In about (10) days the larvae will turn to chrysids and in another (7-10) days your beautifully marked butterflies will emerge from the chrysids. Truly entrancing and educational with extensive well written instructions/explanations of the phenomena you are observing. Highly recommended.
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88562 BUTTERFLY GARDEN |
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