This activity is pretty simple, but lots of fun.

Grab a white t-shirt and some fabric paint.  Either cover a table with newspaper or use an outdoor surface. Then, let your nieces and nephews create away! Or, plan in advance what you'd like on your t-shirt. A flower? A heart? A rainbow? A car? You did need a new t-shirt for the gym, didn't you?

Of course, it's fun for the kids to paint their own t-shirts too. They'll love showing them off in camp or at play dates. Don't forget to have them autograph their work!