This is for the anon who requested chalkboard/cupboard beds/poster walls.
You could paint the whole room with chalkboard paint. Or just do one wall. If that is too much work you could just get a giant chalkboard. Or make a cute chalkboard dresser. Here is a tutorial for that:
Or paint the doors of your cupboard bed thing. Just make sure that whatever you are painting with chalkboard paint has a fairly smooth surface. This makes it easier to wipe the chalk off.
This is a tutorial for colored chalkboard paint:
As for poster walls. Just remember it doesn’t have to be all posters. A little variety is nice.
Hope this helped! If not feel free to send me another message.