[header] How to lay out training stations for gymnastic vaults (preschool ) [title] Lower the vault apparatus. [step] You must lower the vault for safety reasons. You do not want the preschooler running at an apparatus that is at head height. 
If the budding gymnast messes up and goes face-first into the vault, the individual can be injured, have confidence shattered and lose willingness to try the apparatus again. As a rule of thumb, the vault apparatus should not be higher than the middle of the chest.