Little ones aren't the only one with energy to burn! Kids age 12 and older can wiggle and wobble as they learn thanks to the rounded bottom of The SitWell Adjustable Stool. This motion keeps the core engaged while strengthening posture. With the push of a button, the seat adjusts from 15.7" to 21.7" high to accommodate growing children. Requires 105 lbs to adjust the seat down; 250 lbs max weight. User should keep both feet on the ground at all times to remain stable. Recommended for children ages 12 years+. No assembly required. SitWell Stools are GREENGUARD[GOLD] Certified for minimal chemical emissions into indoor air during product use. With a concentration on the Pre K-12 sector, ECR4Kids offers a wide range of products including classroom tables and chairs, preschool rest time solutions, hardwood storage cases, blocks and manipulatives, mobile organizers and a variety of indoor and outdoor play structures.