I'm obsessed with vinyl wall decals lately. They make such a bold design statement for very little money and they come in every theme you could possibly imagine. Just go to Etsy and type in "vinyl wall decals ______" filling in whatever topic you can think of and you'll get thousands of designs to choose from. They work particularly well in kid's rooms and sparsely designed rooms where they can be a focal piece without cluttering things up. Apparently they can even be used to enhance a fridge - who would have thought!