Magnetic wall
In my old apartment we had painted a black silhouette of a tree on the wall. I thought it could be great if it could be possible have a wall painting that was more dynamic and changing. So I got the idea to paint a wall with magnetic paint and then paint the wall white so that it looks like a normal wall. Then with magnets it is possible to make mosaic/pixel “paintings” on the wall. I also use the wall as a sort of guestbook so that visitors can create a greeting.