Our Stateroom Hosts put those pieces of wood in, but they didn't work very well. If one of the kids bumped against the door, the wood would fall out and the door would slam shut. I would use a rubber door stop. I'd also recommend keeping the door locks sticking out so that if the door slams shut, the door doesn't lock. My friend got locked out of her cabin when this happened to us and since her room keys were in her cabin and everyone was in my cabin, it meant a trip down to Guest Services to get another key. Also, we rolled a towel and kept it on the floor of the door jamb so that if it slammed shut, little fingers wouldn't get caught.