Bizi Ball When closed, Bizi Ball looks like an ordinary ball, but when the four sections are pulled apart it comes alive with gentle tactile, visual and auditory stimulation. It helps children work on coordinated movement and assists in learning the concept of cause and effect. Bizi Ball's gentle textures, each of which are significantly different, encourage children to experience the sense of touch and help them conceptualize tactile skills. Crinkle, chime and rattle sounds capture a child's attention, and the teething ring handle with its elastic tether adds extra fun. The high-contrasting colors are visually stimulating, even for children with low vision.