Cute too... if you would reveal what baby is!!! :) If you change your mind... There is a recipe for gender reveal cupcakes also, with a question mark on top! :) But hey, i'll be happy with my top secret message in the mail!
I would put "Who you are" instead of "what you are" cos unless I'm mistaken, it's very likely "it" will be a baby of some description..."Twinkle, Twinkle, Little Star ... How we wonder what you are ..." Gender Reveal Cake