Walkers should be designed to allow for height adjustment. Since even in a short period of time, the child's growth will change and the walker will need to be adjusted for him. Make sure your child reaches the floor with a full foot while in the walker. If he moves on the floor in a walker on his toes or, conversely, on overly bent knees, this can have a very negative effect on his musculoskeletal system, which is still being formed.