I planned this party for my daughter's first birthday. My husband and I, not to mention my daughter, love the book The Very Hungry Caterpillar, by Eric Carle, so we based that as the theme of the party. We were all caterpillared out by the end of the event but it was a lot of fun.
More pictures and details here.
Credit goes to LePoppy Design, she helped out with most of the printable decorations (signs, toppers, etc), since we were living out of state at the time. I didn't have a printer or hardly any supplies to create much.
This party was also featured on The Creative Party Place. I was thrilled.