I found some Shrinky Dink plastic the other day when I was cleaning out my craft room, so I let the kids play with it. They had SO much fun tracing pictures from their books and coloring them. When they first watched them in the oven it was like watching a magic show - they were really impressed at how fast they shrunk and how it they retained all the color and detail.
Did you know you can make your own shrink plastic and recycle at the same time? If you get plastic containers (like from a salad bar or take-out restaurant), check the bottom. It must be number 6 plastic and it will have this symbol on the bottom: . But, you can use it the same way - cut it out, draw on it with permanent markers (or rough it up with sand paper first to use colored pencils on it) and bake it at 300 degrees for about 3 minutes. Fun, huh?