Here's what we started with: a pair of Emily's old jeans:
Here's what we ended with: an apron! You can google "jeans to skirt" and come up with some very helpful tutorials. It was not hard at all!
And here are the prize aprons. These were made out of a jean skirt which was cut in half. They were very, very simple. I used one long piece of material to make ties which threaded through the belt loops. Iron-on decorations completed the look: