You could go with a chic rock look by making your walls (or one wall) black and white with a design. Or you could by stick on wall decals that are black and paint the walls white, to achieve this look. OR, if you are really daring you can go for a really modern look by painting the walls black: if it is does correctly it can look really cool!

Just be careful when designing this room because you don't want it to be to kiddy then you will grow out of it.

HAVE FUN!!