This set includes three silicone sensory rollers, each with a different textured design for little hands to explore. Babies and young children can grasp, roll and toss the spheres while discovering the varied textures. As they move, gentle chimes inside each ball create soft sounds that respond to your child's actions, supporting simple cause-and-effect play. Made from silicone, they're also suitable for teething under adult supervision, making them a versatile addition to playtime at home.