To start with we painted the walls a lighter shade of Batman blue; then I turned my attention to his little race car bed. I decided. I could easily re-do the bed to make a Batmobile! I wrapped the wheels in plastic bags and spray painted the rest of the bed with glossy, black spray paint made for plastic.
Once it was painted and put back together, I adhered a cute little bat signal vinyl decal purchased from Vinyl Designs by CJ (great to work with), and ta-da, Batmobile!
The second project I took on in his room was a cityscape complete with his hot wheels wall tracks. To make the city scape we started by taping off buildings with painters tape. We could have completely drawn it and used a straight edge to make it exact, but we felt we could get close enough eyeballing it.
Then we painted the buildings black (I got a quart of paint for the black). After two coats, I went through and painted some windows in yellow (a little sample jar of paint was the perfect amount). I intended on using a stencil for the windows, but ended up fee handing them. I just randomly chose places for windows trying to make them different between the adjoining buildings. Once it was dry my husband got to create the car tracks. One of these days I plan to add a Batsignal above the city as well.
The third project I did for his super hero room was to personalize his name with comic book scenes and characters. I started with wood letters and painted the edges black. Then I went through random comic books (picked up a bunch on ebay for cheap) picking out various pictures to mod podge over the top. I put on a layer of mod podge, added the pictures, and finished with 2 more coats of mod podge (allowing it to dry between coats). Once it was dry I added some cute ribbon to hang them from.
Nothing too expensive or difficult this room, but he loves his super hero themed room!