Crocheting with Thrifty Store Finds?

I am an empty nester who loves to shop at thrift stores. I have came across big bags of t-shirts, really cheap. I also have come across many afghans. With the crochet craze I thought it would be nice if i could combine the two. Some of the t-shirts have stains and some do not. Do you have any suggestions on how I can decorate them using thrift store finds?

I bought some potholders and I am going to take a nice short sleeve sweater that I bought from Wal-mart about 5-6 years ago and put two of them on like they are pockets. I think it would good with the open weave look. But do you have any sugestions for combining the crochet material with the t-shirts? i would hate to waste them.

Carol