Balance Hedgehog Pods For Kids and adults are excellent for core strength, balance. motor skills and coordination. These hedgehog pods work well to massage tired feet, fallen arches, bunions, plantar fasciitis, and hammertoes. The dimensions, (6 1/2 inches length, 6 1/2inches width and 3 1/15 inch height), of the hedgehog pods work great for all sizes of feet. The Balance Hedgehog Pods For Kids and adults can be used at home, school and gyms. Great for indoor/outdoors. Be creative and play games with them like, the floor is lava or follow the leader. The hedgehog pods hold up to 440lbs. Dome textured, (hedgehog, pebble, surface), flat bottom. Hand pump included for instant inflation. Made of approved phthalates free PVC.