Includes 2 x hypotrochoid templates, each with 3 gears, red, green & blue pens and two 3D glasses
Hypotrochoids are mathematical curves traced by a point in a circle (your pen) rolling around the inside of a bigger circle. These curves have been studied by mathematicians for centuries. Hypotrochoid formulas are complicated, but creating hypotrochoid art is easy and fun! And now with 3-D glasses, your own drawings will stand out before your eyes!