You're right about it being a challenge . . . I've done birthday cakes for my family for years, always trying to out-do myself. When I'm done with one, I go to my drawing desk, hug it, and say, "I'm never leaving you again!" But it is pretty awesome when it turns out right!
Well for me I don't make ponies out of anything inedible; everything you see in my picture is 100% edible. No glues, paints, or anything like that. I have frosting for a pen, and food coloring for my paint brush!