To keep my walls from getting banged up, I use green painters tape to hold foam mats on them. They're just one high (or 2 if they're the alphabet ones) and I change them up every 12-18 months. (I have changed my playroom decor/shelves/toy kitchen/big toys almost yearly since I've started lol...I think I've finally got it where I like and it will stay this way for quite done time!) I also have them in the kitchen where we eat and do art. So easy to wipe down!