Here's a before picture (from a couple of years ago, but more or less the same as a few months ago!)
We got this idea here.
We repainted their coat hooks and hung their Star Wars masks for decoration.
We bought the decals and blinds from ebay.
I sewed the bedding from sheets I bought on Overstock.com.
I didn't take a picture of the new rug, which is a gray shag runner between their beds. We also have a framed Star Wars movie poster hanging over Oliver's desk, but that corner was kind of messy, so I didn't want to take a picture. It's not that exciting, though.