There are so many projects you can do if you want to use Tshirts as yarn. To make Tshirt yarn you simply cut off the bottom hem of a Tshirt (get rid of that). Then from the bottom up to the armpits – you cut off 1 inch strips. Take each strip and stretch it as far as you can (it will stretch quite far). The ends will roll in on themselves and voila – you have tshirt yarn.
Endless options include rugs, crochet, knit, bracelets, necklaces, cording etc.. The opportunities are only bounded by the number of tshirts you can “cut up”.