When the birthday girl wants rainbow cake, the birthday girl gets rainbow cake.
So I guess this is a thing I do now. The make-an-impossibly-fancy-birthday-cake-for-my-child tradition started with the Mermaid Cake (after, of course, a process during which my friend Alisa taught me how to make a cake that did not turn out like this).
Then came the Spooky Ghost Cake, and the Moana Cake, and the Bloodshot Eyeball Cake...and now?