Techno Kids Stack & Spin Gears Super Set includes 32 colorful pieces, 18 gears, 12 base plates, and 2 handles that are easy to grasp and let kids build their own toy! Simply put together the base plates in any configuration, then add on the gears. Two gear sizes allow kids to stack and sort in any configuration they like. Your little one will make an amazing kid-powered machine! It's perfect for an open-ended exploration of simple mechanics. This product aligns with and supports STEM (Science, Technology, Engineering, and Math) standards. Recommended for ages 2+ years.