I was wondering if anyone else has tried making this cake before, I wanted to make the cake for a cousin of mine but I'm just scared that the fondant will fall off. If anyone has made it, just one question. Will the fondant fall off? Any advice would be greatly appreciated...

I am not an expert but I made a fondant witch in a pumpkin the last week, It can be the same idea. It didn't fall off.Depends on How big you want to do it. I assured it with two dowels and a tiny board between the pumpkin and the witch....I hope it can help
you can check out the reference
http://www.cakecentral.com/cake-photo_1279620.html
mariarosa

http://www.cakecentral.com/article46-step-by-step-3d-cake-sculpting-baby.html

if you follow the tutorial you should be fine.

good luck