This is the cake I made last month for my 11 year old son's birthday:
I used this pan and made a 100% whole wheat chocolate cake.
We went to Clark Planetarium up in Salt Lake City and he requested a moon cake. It was really easy to make. I just baked it in the bowl shapes, cut the bottom off one shape so it would sit flat, and then put the 2 halves together. I frosted it and stuck some figures on top. Since I made it out of all whole wheat flour it ended up being pretty heavy, but the kids loved it and had no clue.