I made this sign for my sewing room door out of perler beads.
It really comes in handy since it can be hard to tell this is a sewing room at all, what with all the books and fabric and things obscuring the sewing machine (basing this judgement on my friend who took one look in the door and said “oh! so you’re using the spare room as a storage space now!”). Anyway, the door is usually closed to keep our curious bunny out. This way the mystery of what’s behind the door is removed, and it brightens up the dark hallway.
The inspiration is here, found via pinterest.