Have you ever heard of Hair Stenciling?? It's super fun and super easy. I wanted to tell you about it because NOW is the time to buy colored hairspray stuff. You know, it's in the Halloween section. I would think that except for October it would be a hard item to locate. Anyways, look at this fun:
You basically just hold a stencil against the hair and spray it generously - - then voila, done! The more defined stencils (like zig zags or stripes) work better than the more intricate stencils. The set I used was just a Martha Stewart stencil set - it had lots of options.