If you have a child between the ages of 6 months and 3 years, it is recommended that you adjust your Tripp Trapp chair. This will ensure that your child is seated in the most ergonomic position possible, with their feet supported by the footrest and their back properly supported by the backrest. If you have an older child, it is still important to adjust their Tripp Trapp chair from time to time, as they may have grown since last using it.