DS (7) has attention issues and finds it impossible to sit still. He likes a lot of sensory feedback (pressure) on back and feels the need to push or kick with his feet. He doesn't really get on with a wobble cushion (ends up being thrown across the room). We are working with Ed Psych to work out how best to support him, but one thing we have been advised to do is get a homework desk and solid back chair where he can get his feet on the floor to feel 'grounded'.
I could then tie a bungee cord or exercise around the bottom or look for an under table bicycle thingie. But other than school suppliers most shops just seem to do stools or grown up style office chairs which spin round...and round. Help me oh wise MNetters!