The Miracle Belt
The Miracle Belt is an adjustable weight belt used to promote balance as well as providing sensory input for children with cerebral palsy.
 
The Miracle Belt retails for $40-50 dollars, depending on size, and is used to treat not only cerebral palsy but autism, apraxia, ataxia, and several other childhood disabilities. There is a ton of additional information on their website, found at http://www.miraclebelt.com