Kids Yoga Ball and Chair Blue Kids Funny Faces Stay-N-Play Ball (45cm) Who said sitting had to be boring? Our stay-n-play balls with silly smiles make sitting fun and keep your littles active. Built-in stabilizing legs Encourages healthy posture Keeps the mind engaged Ideal for ages 5-7 Measurements: 45cm ball. Weight Capacity: 175 lbs. Very good condition.