This translucent, customizable gear toy features 8 gears in 4 colors and 2 sizes. Easily insert the gears into the 156 holes in the baseboard. Move, connect and spin the gears to create endless combinations. Explore cause and effect, spatial reasoning, and critical thinking with this early STEM set. Teach children that actions and design affect outcome. Help your toddler develop curiosity, attention to detail and intentional play. This product is also a perfect sensory toy for children with autism. Use it on a light panel to enhance sensory play and color discovery. The baseboard features rubber feet for stability, and the components are made of durable plastic. Includes 1 baseboard, 2 large red gears, 2 large blue gears, 2 small orange gears, 2 small yellow gears and an activity guide. For ages 2+. Size of baseboard: 11.6"L x 11.6"W. Size of small gears: 2.6"L. Size of large gears: 3.75"L.