Last month I attended a baby shower for my husband's cousin who was about to have triplets. Two identical girls and a boy. At the shower we got to decorate the cutest onsies ever! The idea came from my cousin Meg and it was so fun to do! (See here for an easy tutorial.) These are the onsies I did.
Update September 13, 2011:
I did do an activity with the girls in my ward and they really enjoyed it. I didn't get any pictures, but it was fun to see how different and creative all the girls were when they design their own t-shirts.
Also, here are a couple more onsies from a baby shower held for my cousin at the beginning of the summer. The hedgehog one is mine and the frogs were done by my sister April of AE Design.