The Amazing Peanut Ball XL - Blue.

A perfect saddle seat for children through teens who yearn to wiggle but need more stability than a traditional therapy ball. The Peanut Ball encourages balance and stabilization of the core for an active learning posture. Like exercise ball chairs, it helps to enhance focus by supporting the user’s natural desire for movement. Instead of rolling every which way with a therapy ball, kids can rock back-and-forth or side-to-side. Recommended for daily exercise, positioning and therapy programs. Holds up to 200 pounds!