These gross motor development toys come in an assortment of heights, diameters, and foam densities to create an engaging balance challenge for students. Three foam densities (soft, medium, firm) encourage students to be ready to adjust their approach as they prepare to step on the next stone. Stones also vary in height (2”, 3”, 4”, 6”, or 8”H) and diameter (8”, 11”, or 13” dia) for an extra challenge. A tough vinyl cover protects the foam core and is easy to wipe clean. Textured bottoms add extra stability and prevent the stones from slipping when stepping on them. Each set of stepping stones weighs 14 lb total.