For #1's birthday we held a decopatch party at a local craft cafe. The best way to run a children's party is to get someone else to do it for you. The result was ten decopatched chihauhaus and one dinosaur (for #2 - the token boy at the party).
We all came back to our house afterwards for a Hello Kitty piñata and some party games. After watching 10 girls bouncing round the house for half an hour I was exhausted. We tried to stretch a game of sleeping lions out to 10 minutes, but they weren't having it. They all enjoyed themselves though, which is the main thing.
I've to do it all again in 2 week's time and then it's all over for another year.