Zivko the Robot. Our best selling STEM kit ever! Just call her (or him--it’s unclear and we don’t like to ask) “Zivko” because “the Robot” is her last name. Using just a screwdriver and side cutters, you build Zivko from this 107-piece S.T.E.M. kit. Set the mode for “Follow Me” or “Explore,” and Zivko will, yes, track you, or evade obstacles, respectively, via an infrared sensor and micro-controller programming. Interactive LEDs and sounds abound. Measures approx 5" x 5-1/2" x 6-1/2" when assembled with all (6) legs. You add (4) “AA”s for power, which is the least you can do for someone this cute. Ages 10+.

with our best selling electronics kit. Build 100 or more electronic projects from a Reflection Detector to a Simple Salt Water Alarm with Snap Circuits Jr. The Elenco kit, a Dr. Toy Winner, has a grid base and a selection of conductors, resistors, switches, integrated circuits and more, for a total of (30) color-coded snap-in parts. For ages 8 to 108, the easy-to-use components and well-designed instruction manual make this a perfect way to spend some quality time with a bright young child! AWARDS: The National Parenting Center-Seal of Approval, Dr. Toy 100 Best Children's Products, Dr Toy Best Educational Products. Ages 8+. See our full line of Elenco Snap Circuits here!

if you want to sound like a steam engine, and who among us doesn't? This Velleman® steam-engine sound generator kit comes with circuit board, components, battery connectors, speaker and instruction sheet. You add solder, a soldering iron and a 9V battery. Volume and (implied) speed are adjustable and there's a horn button, so it'll go both choo-choo and whoo-whoo. Great for train hobbyists or people bored with their doorbell. Ages 10+.

The vegetable- or fruit-powered clock never gets old. You get (2) copper and (2) zinc electrodes, 4" x 1/8", a couple of pieces of wire and a little 1-1/8" dia LCD clock. You don't add any batteries, just bring a lemon, lime, grapefruit, potato, kiwi, strawberries (or some cola if you're not a healthy eater) and time is on your side. Ages 5+.

An advanced kit compared to the others, a little more deluxe and a little more complicated. It is an AM/FM radio kit from Elenco with over 80 pieces divided into lesson groups. PC board shows component placement to help learning and to minimize errors. It has (14) transistors and (4) diodes and the case measures 11"x 5"x2-1/4". Ages 12+, as considerable soldering is required.

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+.

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+.

Nice little 8-LED running light kit from Velleman® has program and speed controls. You control which lights go on and off, and how fast they "run" in sequence. It's the basic concept used in those vintage blinking signs that entice you into car dealerships, amusement parks and cocktail lounges. You get the PC board and all the parts except the 9V battery you need to let the little lights shine. Ages 10+, as some soldering is required.

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.

Electronic fun with just a hint of soldering from Madlab. You pick: the lie detector kit, with a PC board and components, or the LED logic game with diodes and transistors that pit your skill against moving a peg along (36) pads. You should be able to assemble either kit in under an hour with a little light soldering. You add a 9V battery to both. For ages 10 and up. Soldering iron not included. But we have one, and it’s item #88242 for $6.95.