Stamping Tees

I know, I usually only post the things I've already done. But . . . I saw this on Martha (TV show). I don't really love the design, but I DO love the idea. The lady made her own stamps from rubber and then just stamped them on the tee with fabric paint. How easy is that? I don't know if I want to go as far as making my own stamps but I think some of my pre-made stamps would make adorable baby onsies. I think I'm going to try this soon. I'll let you know how it goes!