Needed: birthday party ideas

It's so easy to find 1st birthday party ideas. See what I mean? There are hundreds of quality websites that have birthday party ideas, themes and supplies for first birthdays, but what about second birthdays? My son is turning two, and I'm stumped for what birthday theme to use. I think at this rate I'm going to have to check out Party City and pray that they have something cute that isn't too generic or overused! Wish me luck!