Make an old t-shirt into a cool knotted neckpiece... tutorial
How to make an EC potty cozy from an old t-shirt in ten minutes with no sewing.
Things to eat
Awesome tutorial for how to make these t-shirt and felt flowers
infinity scarf made from old t-shirt -- video tutorial
How to make fabric yarn (from old t-shirts, sheets, etc.)
(How Fun!) DIY Cat Tent From Old T-shirt and Hangers