SPEKS BUILDING MAGNETS: 512 rare earth magnets. Smaller in size but endless possibilities await.CREATE: Build and engineer limitless shapes and structures.STRESS RELIEF: From the board room to the dorm room, mash and smash stress away.INCLUDED: 512 rare earth magnetic balls (2.5mm diameter), metal building base, plastic splitter card, 16-page starter guide, and carrying caseFor Ages: 14+Limit 2 Per CustomerWARNING: Choking Hazard, Small Parts. Not For Children Under 3 Years Old