The Cando balance stone set is a versatile addition to a therapy or play regime and can be used to practice and reinforce coordination, proprioception, and balance while providing sensory input. The stones can be filled with water or sand to weight them for added safety and stability. They balance stones are versatile as they can used with the curved side down as a vestibular balance board or seat. Also, they can be used with the spiked side up as a sensory seat. This Cando balance stone has many uses making it ideal for individuals with Autism and SPD. The stone is blue, 13" and is sold individually.