Never done it before but I'm sure the boys would get a kick out of it. And I can always go for some cake.
DH is not a cook by any means but I'm thinking I could just pre-mix dry ingredients and surely he can figure out the rest.
The other option is a fantastic vegan cake (like a 1/4 of a sheet size) at our local natural food store but we'd have to have someone go get it for us... We're 45 minutes away from town.
Anyone else do something to celebrate on Birth Day?