Gears are science in motion! 15 interlocking gear stencils represent round, square and oval gears, allowing the artist (or engineer!) to fit them together to create a mechanical masterpiece. Set of 15 interlocking semi-translucent plastic stencils ranging from 3"-9" and guide. Age 4+ Made in USA. Sold as 3 sets for a total of 45 stencils. This product ships in approximately 1 days