643824 Klutz Diy Rainbow Catcher: Maker Lab Stem Kit

Build a motorized machine that makes rainbows spin around your room! Gears and electronic components snap together, and machine sticks securely to windows. 8 experiments and activities using easy-to-find materials from home. Learn about the science of light, optics, and weather conditions for rainbows in the 32-page book Two AA batteries needed from home