The Simple Sitter™ Chair is available in five popular seat heights to allow the children's feet to rest on the ground for maximum comfort. Durable Baltic Birch Chair. The wide, no-tip base keeps the child stable and secure on the floor, while strapped with the adjustable harness. This Baltic birch chair enables children to self-load with minimal assistance and has a food-service grade finish that is easy to clean and sanitize. Recommended weight below 40 lbs.