One of those play yards works well to some degree because he can take a toy in there and play with it without another child touching him or it. Depending on the other children in the program you may be able to convince them that this is XXXXX place to play and we need to leave him alone when he is in there. The one rule though is that he is only allowed one toy in the "safe" zone. He may go out and trade as often as he wants but he can't hoard.