About this 3D model

Marbles trace the geometric figures on the wheel. Designed for a math class. Video here: https://www.youtube.com/watch?v=-BMMe7VAQnM. If you made "Perpetual Motion, da Vinci Style", this wheel will fit that base, and the perpetual motion wheel will fit this base. Designed using Sketchup 8 and printed in PLA on a Makerbot Replicator 2 using Makerware 2.3.3.42 "Standard" settings.