The bumps and tacky surface of these sensory balls work together to make them easy to catch and hold. When fully inflated, the small plastic beads fill only 1/3 of the chamber, and when rolled or shaken, the beads provide audible feedback of the ball's movement. They also provide a deadening effect that, depending on the degree of inflation, can turn Roll-N-Rattle Sensory Balls into beanbags. Each ball is 4 inches in diameter.
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