Seeing as I'm only 22 months old and don't have any wrinkles yet, we couldn't try out Botox, which was Mommy's first idea. (We already tried taking a long bath to create wrinkles...)
Her second idea was to wrinkle up a piece of paper and then do a crayon rubbing on a smooth paper over the wrinkled paper. That might be fun if you're a little older than 22 months, but I still am not too excited about crayon rubbings yet. I'd far rather eat the crayons.
So we went with MY idea, which was to take a wadded wrinkled up piece of paper, dip it into tempera paint, and paint with it. Way cool! Kitkat was impressed! Here's my design:
For more "wrinkle" ideas, check out Unplug Your Kids.