Drawbot 2nd-8th Learners build a small foam machine with marker legs that vibrates across paper and makes its own art. Then they rearrange the parts to change... $8.95 Electric Vehicle 3rd-8th Learners wire a motor and gear into a working electric car and watch it drive. Swapping two wires reverses the polarity and sends it backward.... $8.95 Eyelusions 2nd-8th Learners build a motorized spinner and draw two half-pictures that merge into one image when it spins. It is a modern take on the thaumatrope,... $8.95 Monster Claw 3rd-8th Learners build a cardboard claw and power it with air, using pneumatics, so pushing one piston opens and closes the claw at the other end. It ... $8.95