this year oscar wanted a strawberry-vanilla robot cake. i swirled together strawberry cake batter and vanilla cake batter into two 9 x 13 pans and that made enough cake for the head, body and legs. the arms were made out of rice krispie treats. i used fondant for the silver parts, because there was no other way to make them silver, and for some reason i really wanted them silver! i used edible marker to write the birthday greeting - how is it that i've never had any of these things before? they're awesome.