SOFT AND SQUEEZY... You'll love the feel and versatility of our soft weighted therapy balls! Excellent for providing deep-pressure, proprioceptive input, these 5" diameter balls are the perfect size for children. Firmness can easily be changed with a needle-nose style pump (not included). These therapeutic sensory balls are a popular PT therapy tool for upper extremity strengthening and developing gross motor skills. Soft Weighted Balls come in your choice of 5 different weights.