Hypotrochoid Spiral Art Set
A classic and absorbing drawing set, easy and fun to use. Hypotrochoid is the mathematical term for a line traced by a fixed point in a circle (your pen) which is rotated around the inside of a larger circle. These beautiful flowing curves have fascinated mathematicians for centuries. Different points within the small circle produce wildly different patterns. Hypotrochoid formulas are complicated, but creating hypotrochoid art is easy and fun! Order one today so you can forgive your mother for selling your Spirograph at the yardsale. Contains 2 hypotrochoid templates, each with 3 gears, plus red, green and blue pens. 11 piece set in a tin with instructions. ____ From NPW USA/Worldwide Co.