I have always loved to Tie-dye things, I have since I was little. When my boys were little I used to tie-dye their little t-shirts whenever they started looking too grubby or stained from food. It seems another member of my family may have inherited this love. W bought a white T-shirt at the thrift store this winter and, after a few uses noticed it had a spot that wouldn't wash out (he hasn't changed that much since he was a toddler after all). He decided he would use some of the black dye I had mixed up for another project (I found a very nice pair of Lululemon fleece yoga pants at a thrift store for $1 but they were a mauve colour and I prefer black) to dye his shirt.
He sorted out how he wanted it to look and used elastics to "tie" it.