Patented double-locking system for ultimate safety: GeoSmart is a leading innovator in magnetic toy safety. All GeoSmart sets are compatible - endless building possibilities for kids ages 3 and up! Manufacturered by GeoSmart. GeoSmart offers unsurpassed safety and durability for endless creative play! Includes 31 colorful geometric pieces that enable creativity while having fun STEM-Focused magnetic building: Includes a spinner for dynamic play!