The original 4" sensory balls now available in a unique combination that include even more sensory development and stimulation. Includes the popular senso dot featuring contrasting colored nubs (adds visual sensory development), a see me (see through), opaque (solid color) and a brand new scented original sensory ball for even more stimulation. Edushape sensory balls feature very thick material and a non-removable inflation/deflation valve to ensure a long lasting toy. The multi-sensory balls encourage the development of fine and gross motor skills, hand eye coordination, tactile sensory development, and socialization plus is an EZ grip product. Edushape's sensory balls have been a favorite of infants and toddlers for well over a decade and used by parents, caregivers, day care, pre K, schools, adult and pediatric therapy for their soothing, stimulating and developmental qualities.