My granddaughter has this nice large Disney Princess Castle Wall Decal Set. ( 1 very large piece and 5 smaller ones to add to the castle. It is very nice on her dark pink wall. Next is the collection of Disney Princesses and other additions to each Princess. You can layer the decals to make a nicer picture. Like placing a Princess on the stairs and maybe even add some fairies too. 
  

Pros: Great on colored walls, removable, hand wipe clean, and spark the imagination.
Cons: Just a tip: It takes two people to apply the largest piece of the castle and get it up hassle free.  It will fold on you and stick to itself.