The other week my anime club had a "Bleach" day where we made Bleach spray T-shirts. You take a 50% concentration of bleach and water and spray it over the shirt. You can make a design out of contact paper and when you spray the solution over the contact paper and then remove it, it makes as design as in the first picture where the teen cut out a dragon design.
With teens you do have to be careful with such dangerous chemicals. I had to stop one teen from trying to sniff the solution and another one from pouring so much on the shirt that it almost ate through the material. Aside from having the auditorium smell like a public pool, it was a fun and easy craft.
