Hello again I work with children that have autism. One of my kids is 7 and is in a lbb. However, he has started unbuckling his belt. He doesn't have the cognitive ability to start a plan to reinforce him not to do that. Another point is, his muscles. He is very weak. His trunk muscles are not what they should be. He lays down a lot, because its easier for him. His mom is now OK with putting him in a 5pt, but he is very tall. His dad is 6'3" and mom is 5'11". She was supposed to email me his stats, but haven't. I know he is too tall for a Nautilus. Any other suggestions?