Create complex epicycloid drawings with ThinkFun’s HypnoGraph, a marvelous drawing machine! Easy to use and fascinating to watch, the machine creates an infinite variety of drawings consisting of beautiful repeating curves. Fully adjustable parts can be configured differently to create drawings using the 13 interchangeable gears of varying sizes. Create drawings using our guided setups, or rearrange the gears to design something completely unique! Click here to download a printable template for more HypnoGraph circles.