Hiding holes, ramps, bumps, semi-circles, and equilateral triangles are perfect for pull ups, clumsy balancing, and fall downs.12 sided, 12" high size appropriate for crawlies, toddlers, and 2's. Hiding holes, ramps, bumps, semi-circles, and equilateral triangles are perfect for pull ups, clumsy balancing, and fall downs. 19 individual pieces Velcro together in 7.5" diameter floor space.