I love the idea of chalk paint in bath/powder room that guest use. or a wall paper or paint that would be easy to graffiti. then leave a cup of chalk or sharpies on the counter so every one can write on the wall.like a public restroom
Chalkboard paint with a layer of magnetic paint underneath. Frames were painted and affixed to the wall with velcro (so they can be removed but little hands can't knock them off). Love the idea of Velcro on chalkboard wall.