It ended up by far being the most fun art project with the most stunning results if you ask me. For the most part, I think that the campers really liked making them. It was beautiful to walk out to the clothes line and see a bunch of these all hanging together.
The process is pretty simple really.
You begin with a piece of material (we used white bandannas) and you use Elmer's blue gel glue. YES, it has to be the blue gel glue. We used the clear and it did not work nearly as well. Anyhow, you simply draw your desired design onto the material with the glue.
Then, let the glue dry completely. completely. Overnight is the best bet.
Once the glue is completely dry, use slightly watered-down acrylic or fabric paint and paint the bandanna. For best results, paint within the glue lines as in a coloring book.
Once this has completely, completely dried (again, over night for best results), soak the bandanna in warm water for about 15 minutes (or longer). Once it has been soaking, the glue will soften and you can use your hands to rub the bandanna fabric together and rub off the glue. The areas where there were glue will be white!