Map Dresser - so fun, and maps are pretty inexpensive or something you already have! I can see this applied to a child's dresser or headboard or pictures on a wall.- would paint the dresser a dark color maybe red or blue for a more masculine room.
Dishfunctional Designs: Global Recycling: Old Globes Upcycled. I like all the ideas, but may actually try this one! i already have about 10 globes so I should probably do something different with some of them anyway!