My daughter was given the sensory ball as a gift. She has difficulty with motor planning and has limited use of her hands and arms, and has cortical visual impairment. This ball has provided an opportunity for her to be included in an age old past time with her siblings and peers. The sides of the balls have areas where she can grip the ball and gain control prior to handing it off or throwing it to someone else. We had never seen a ball like this before. The colors are bright, it makes a crinkling sound when manipulated, it is easy to grasp, light weight and well built. We couldn't be more pleased with this ball. We would definitely recommend this product! Thank you so much Dr. Fox