The Sensory Rock-A-Stack toy from Fisher-Price adds a fresh element of fun to this classic roly-poly stacking toy. Each of the 5 colorful rings features different textures, fabrics and taggies to engage and delight your baby’s senses. Babies will love touching, grasping, shaking and stacking the rings on the wibbly-wobbly base, exercising their fine and gross motor skills as they do!