If you google yarnbombing, you should see lot's of it. Some of it is so beautiful and ingenious. I'm dying to yarnbomb something. But I do think of the cost too. But heck, that's what the cheap yarn is for! Actually, if you recycled plastic bags or t-shirts to crochet with, that would work also.

A good site to check out yarn bombings, crochet art and artists, crochet on the runway, all kinds of interesting crochet things, is Crochet Concupiscence. Kathryn is actually a writer that loves crochet. She researches and reads and writes relentlessly about crochet. Great Blog.