Use Necklaces to simulate getting a shirt over your head, and bracelets to simulate getting a sock on toes.
Here is a therapist who created the fasten-ator. Her website is www.school-ot.com. Her name is Jennifer Dodge. Here is what she says on her site about her product. “I designed and sewed up the prototype (in the picture above) for this after trying to work with a 5th grade boy who had Downs Syndrome. He