My son was turning 6 and long story short he has autism. For years birthdays have been torture when he was 5 he decided they were okay, but still tolerated it didn't get all into it like most kids do. When he turned 6 this year he was AAAAAAALLLLLLLLLLLL about the birthday. He was very very specific that he wanted a "blue 2 headed 2 tailed zippleback dragon cake" from How to Train your dragon. Birthdays have never been fun so when he asked I jumped. The cake was almost 5 feet long. When we lit the candles the paper caught on fire. It was awesome. He loooooooved it. Here's a few pics but you can see the process here http://archibaldfive.com/?p=1236
Oh and my boys are all gluten free/casein free so the heads of the dragon were GFCF and the body was normal cake. The hungry hoard of kids slaughtered the cake in about 10 minutes including the rice krispy treat appendages. It was a HUGE hit.