Please help me! We have to move to a townhome. Our autistic son has terrible tantrums and screams. It's not so much of a problem now because we live in a house. But we will shortly be moving to a townhome. (no choice). How do I soundproof his room without damaging it? I don't want to get kicked out from the noise, nor do I want to get kicked out because of the noise! No neighbors downstairs. Neighbors on other side of wall. I don't have permission to rip hole in the wall, of course. Any ideas for something I can attach to the wall but that won't damage it too much?