Product Description Each colorful ball is uniquely textured with fascinating dots, lines, and swirls. Meanwhile, short, safe tethers keep them all connected in a wonderfully wobbly row. But the best part? Each ball opens up and fits snuggly into the next! Clever innovation inspires hours of tactile exploration with OombeeBall. OombeeBall Set of textured, tethered balls that open up and nest inside each other Encourages sensory exploration, tactile learning, fine motor skills, object permanence, spatial reasoning A cleverly innovative early-learning experience! Each sphere engraved with vivid textures - Dots, lines, ribs, swirls All parts are tethered together with short, safe tethers Features 4 spheres that fit inside one another - Smallest sphere does not open up High-quality materials and construction - Lasting durability and safety