Spectacular Spirals Make Dozens of Beautiful Designs (Paperback)

From the Publisher: Pop a pen into a gear, move it around a template, and you've got a spectacular spiral! The three gears and two templates that come with this innovative kit allow you to generate hundreds of colorful, eye-catching designs, while the accompanying book explains the fascinating yet easy-to-grasp mathematics governing the appearance of spirals in art and nature.|   Kit includes: - 56-page paperback|- 2 pens|- 2 spiral templates|- 3 plastic gears to make hundreds of different designs