When setup as a highchair the Tripp Trapp is good for children from 6 months to 3 years of age. After that you can remove the highchair components and use it as a standard chair from ages 3 to adult. To do this you simply can remove the straps, pads, and tray and then start to move the lower shelf (the foot rest) down to the appropriate level. The chair can support and infant with a special infant accessory.