This is gonna sound like I'm trying to flex that mine had more stars than yours but I'm not, it's a genuinely true story. My kids are all grown up now but when they were small I had them at the weekends. When I got my council house I decided before I even moved in that I didn't care about this house, this was a kids house. So I let the kids decide (With my input) on the decor for 90% of the house, we had a bathroom done out like a murder scene for a while, it was a lot of fun. The two bedrooms though, we did one as the night time sky and the other as the day time sky. For the day time we painted the walls and celing a pale blue with a long shaggy green carpet on the floor for grass (Looked cool but never again with kids) and then used white paint on sponges to make clouds all over the walls and celing, then a yellow ball from the top of a British Belisha Beacon was aquired (Don't ask how. Lol) and used that as a light shade to represent the Sun. In the night time room we painted the walls and celing a dark blue with a shaggy dark blue carpet and we got loads of bags of different sized luminous plastic stars and solar system planets and put them every where, we made a moon shade for the light and put a low wattage bulb in it (We had a few lamps dotted about for actual light and charging up the luminosity of the stars). A lot of fond memories, I no longer live in the house now though and jokingly avoid it in case the new tenent finds out it was my fault they had to remove all those bloody stars before they could decorate, there was hundreds of them.