Patented KrunchCOR construction absorbs impact, will not break windows This super lightweight ball means that kids can play ball safely in the house. COLOUR-IN your Ollyball with any marker or crayon Follow the cool designs and colour-in, to create your own customised Ollyball. Shell made from high-performance kite material Easily inflate or deflate with the included straw. Ships deflated. Simply follow the easy instructions for inflation Great for rainy days, snowy days and parties Ollyball is waterproof, and can be played with indoors or outdoors Playing with the Ollyball improves eye-hand coordination, balance, and fine motor skills. The coloring component to Ollyball also greatly helps kids find a meditative and calming activity in-home or even on the road. Kids, teens, and adults with ADHD, autism or other educational, learning, or writing disabilities find Ollyball to be a form of therapy for daily stress. Ollyball helps develop focus, creativity and creative thinking.