Crankie Contraption 1st-8th Learners build a hand-turned cardboard theater and illustrate a story that scrolls across its screen like a movie. Crankies come from a long t... $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 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 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 Scene Machines 2nd-8th Learners build an automaton, a hand-cranked machine where turning a handle brings a scene to life. They invent the characters, art, and story,... $8.95 Screen Machines 1st-8th Learners build a cardboard screen with wooden scroll handles, write and illustrate a story on a paper strip, and crank it to play like a tiny ... $8.95 Strawbot 2nd-8th Learners build a straw robot with a motor and an off-center weight and watch it shake and skitter across the table. Then they turn it into a S... $8.95 Wind-Up Vehicle 2nd-8th Learners build a car powered by a wind-up spring, then take it apart and invent a vehicle all their own. There are no batteries, no wiring, an... $8.95