I would love to do a belly cake for a friend, but I need to know what are the cake molds that I need to use . thanks

you can use a large pyrex bowl for the belly or 1/2 of the large ball pan, and for the boobies you can use the small pyrex bowl or the mini wonder molds, they look realistic... i secretly think wilton made them for naughty cakes if you look in my photos there is a green belly cake and I used the small ball pan for the belly and mini wonder molds for the boobs...hth gl

i've never made one but maybe this thread will help.
http://forum.cakecentral.com/belly-cake-ftopicp-5963721.html#5963721

I did a belly cake for a baby shower and I made a 1/2 sheet cake and for the belly i used the soccer ball cake pan and for the boob's I used a small foam ball and cut it in half, making it flat on the bottoms and rounded on the tops. I covered them with fondant dress, turned out so cute!! If you check a craft store you can find foam balls you could cut in 1/2 for the belly if you don't have the soccer pan. Hope this helps, good luck!

I used the ball pan and mini ball pan.

same here, the sports ball pan and the mini ball pan

mini egg shaped and the big decorated egg shaped pan also work.

looks more natural to me at least.