We had BOXES of t-shirts in the shed waiting to be turned into memory quilts. I am finally done cutting the images off the shirts. I've reduced the pile to a 5-inch thick stack! Oh, my, that's probably 3 or more double sided quilts!
If you didn't want to make quilts, making yarn out of old t-shirts is fun too. Then it can be knitted or crocheted with big needles or even finger or arm knitting.