Art Machine K-5th Art Machines are kinetic sculptures designed and built to move. Learners connect levers and fulcra into a machine that stretches out and pulls... $8.95 Blendie Pre-K-8th Learners build a spinning top, test which designs spin best, then color it so red, yellow, and blue blur into brand-new colors as it spins. Ev... $8.95 Hypnotizers K-5th Learners build a wind-up machine that draws hypnotic spirals by itself. They choose the colors and placement, and stored spring energy does th... $8.95 Monster Mouth K-5th Learners design their own monster and give it a pneumatic, air-powered mouth that opens and closes as they push and pull. Character design, st... $8.95 Straw Structure Pre-K-8th Learners connect jumbo paper straws into shapes, then into towering 3D structures as tall as they are, then team up to reach the ceiling. It t... $8.95