EXTREME Expand-A-Ball expands and contracts just like magic! This huge, colorful, mesmerizing sphere expands to more than TRIPLE its original size, growing from 9.5 inches to 3 FEET (36 inches) in diameter with just a slight pull! Watch this Extreme Expand-A-Ball both expand and shrink as you toss, roll, push, and more. Extreme Expand-A-Ball is even a great anxiety and stress relieving toy, perfect for soothing and calming a busy mind with sensory engagement.. Extreme Expand-A-Ball makes for a super fun sensory and fidget sphere that is engaging for both kids and adults!