I know I found the link in English somewhere...but here you can see awesome photos of how it works step by step.
First, you need to cut along the hem of the t- shirt all the way up to the armpits in strips to create loops to weave with. The kids are also finger knitting large ropes and weaving with those as well. I told them I"d post this so they could do this at home.
Happy Weaving!! I"ll post pictures of us hard at work soon!