I always use wacky cake as my base for kid's birthday cakes, because you often need a double or triple batch and they really only eat the icing anyway, which is expensive if you need lots of eggs and butter in your gluten free cake recipe. Wacky cake holds it's shape well when you cut it out, and if you make it chocolate tastes pretty good gluten free.
Now that I'm through the last 6 weeks of "3 kids' birthdays plus various other crazy life events" I will get back into some sort of routine and try to find photos of Miss 6 and Miss 8's cakes. When I find them I will post them here. If only posting photos here meant I was scrapbooking them as well. Sigh.