Amazon.com: Body Sport Exercise Ball with Pump for Home, Gym, Balance, Stability, Pilates, Core Strength, Stretching, Yoga, Fitness Facilities, Desk Chairs – Green 55cm : Sports & Outdoors
Gaiam Kids Stay-N-Play Children's Balance Ball - Flexible School Chair, Active Classroom Desk Seating with Stay-Put Stability Legs, Includes Air Pump : Sports & Outdoors
Amazon.com: Champion Sports Blue Training/Exercise Ball, Royal Blue (BRT42), 42 cm : Sports & Outdoors