Sounds like you need another bunk bed set for your boys. That way once they each have their own rooms again you can break up the bunk beds into separate beds for them. Check out the Craigslist free section as well as your local thrift stores. In the meantime, the first thing that came to mind is that both Toy Story and Mickey Mouse have the color red in common. See if you can find some red curtains for the window. Next, designate one side of the room for Toy Story and the other side for Mickey. Sew or tie some ribbon loops to any stuffed toys, then nail some picture hanger hooks into the walls that the stuffed toys can hang on to. The Toy Story stuffed toys go on one side, Mickey stuffed toys go on the other side (that keeps them off the floor. You can also purchase inexpensive wooden letters that spell the boys names and hang those on each wall (maybe even let the boys paint the letters themselves?. Have fun and get creative!