Feather shirt = felt cut in desired shape and sewed to a shirt or sweatshirt - Le Bestiaire- I would do one of these but instead of on the front I would wings on the back. clothes-diy-clothes CREATE: T-SHIRT DIY MADNE
Here's a little tutorial on how to make your own rubber stamps. I like to use a stamp carving block as this allows you more freedom with the size. It can also be nice to affix your stamp to a woodblock to make stamping easier.
crochet detail on t-shirt restyle - great way to make a shirt just a little bit smaller around the waist, or where you need it. (I've pinned something like this already, but here she uses a crochet hook and has lots of close-up pics.