One of my boys has it diagnosed and the other I suspect has it too. Constant moving. Not a lot of sitting still. The one with the diagnosis recently started seeing an occupational therapist for it. Can't tell if that's helping yet. The OT also gave us a sensory diet for home, but my son refuses to do much of stuff on it. You may want to consult a book called "The Out of Sync Child" which talks about how to help children with vestibular processing issues and other sensory issues.