Often supermarkets sell their fruit, meat or pizza on styrofoam trays. Normally these things are thrown away but it is possible to use them as stamps. I stamped this fabric with them. With a pen I drew figures in it, applied some setacolor opaque with a foam roller and placed the stamp on the fabric. In this case Kona black. Instead of a pen you can also use a toothpick or a knitting needle to draw with. Certain types of glue 'eat' the styrofoam and by using this glue you can create patterns as well.