For my soon-to-be-5-year-old's birthday, he wanted a guitar cake.
My Mister and I outdid ourselves, I think:
Update: I submitted my cake to Coolest Birthday Cakes so stop by for more information on how you too can make such an awesome cake (or you can just ask me). :)
(I wish I had come up with the idea of that website- with how much traffic it gets, he must do okay off the ad money.)