4M - Tin Can Edge Detector Robot
Build your own edge detecting robot using a recyclable soda can. Watch it glide across the table without tipping over.
Kit includes base cover, base with wires, lower can ring, upper can ring, gear top plate, battery cover, 2 lower arms, 2 upper arms, 2 transparent covers, motor with wires, 2 axles, 2 eye supports, 2 eyes, 2 sets of bolts and nuts, 2 gear wheels, 2 terminal caps, 5 small screws, and detailed instructions.
Required, but not included: clean empty soft drink can, small cross-head screwdriver, one AAA battery. Recommended for ages 8 years and up.