Gaiam Kids Balance Ball Chair - Classic Children's Stability Ball Chair, Child Classroom Desk Seating ALTERNATIVE DESK CHAIR: The perfect kid-sized seat for improving concentration & focus at home or in the classroom at their desk, this exercise ball chair helps to reduce restlessness, fidgeting and prevent boredom ACTIVE LEARNING CHAIR: Stability ball chair promotes a healthy posture & keeps the mind focused and body engaged - Statistics have shown that kids are able to focus more intently when actively balancing their body on a balance ball RECOMMENDED USER HEIGHT: Designed for kids ages 5-7, or children between 42 and 51 inches tall making this active sitting chair ideal for preschool, 1st and 2nd grade students. Weight limit: 175-pounds. INCLUDES: Child-sized 38cm balance ball, easy-inflation air pump, adjustable back support bar, secure metal ball holder, and easy-glide caster wheels (2 lockable) INFLATION INSTRUCTIONS: For a perfect fit, it may be necessary to re-inflate the ball once or twice after the initial inflation to stretch to its final size. Inflate ball with air, let stand for 24 hours, deflate 50% then fill again to 38cm height.