I have this vision in my head of a Valentine's Day cake that has a round base cake with a standing heart cake in the center of it, but I am not sure how to stabilize the heart.  I was thinking of making a smaller round cake for the heart, then carving it into the heart shape and covering it with fondant.  Would wooden skewers hold it in place?

ASo I am literally picturing a heart standing on it's point, which requires some internal structure, for sure. I would probably make the top half of the cake actual cake, and the bottom part that ends in a point, with RKT or foam. I'd rig up some sort of dowel system that is secured to the cake board, underneath the round cake that you speak of.

What you are picturing is exactly what I want to do, but I just couldn't figure out how to make the structure in such a way that the point wouldn't collapse from the weight of the cake.  Thanks for the great ideas, I think I can make that work.