This isn't my idea, nor is it my project, but I saw this yesterday for crocheting rugs from old t-shirt scraps and it looked inspiring. I might try it if I can work up the gumption to go in the garage for the old tshirt box. I'm envisioning something smaller like a teapot sitter-onner. :)

.. it's in Russian but sometimes it's easier for me to replicate something from pictures alone.

OlinoHobby - Crochet Rug from T-shirts and Yarn