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 Mazes K-8th Learners design a ramp path so a ball zigs, zags, and zooms into a hoop, then connect their maze to a partner's to build one long run. It is a... $8.95 Linkages K-8th Learners connect cardboard levers and pivots into moving mechanisms, then hide them inside creatures and characters, like animals that dance a... $8.95 Flying Machine 1st-8th Learners build a rubber-band-powered flyer, draw and cut their own symmetrical wings, and launch it again and again to see how each design fli... $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 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