I often make figures that are fondant/gumpaste and tell the customer they shouldn't try to eat them because they have supports. Kids and many adults will try to eat EVERYTHING! I like being able to say the whole thing is edible, so whenever I can I do make everything out of yummy fondant. All of my cupcake toppers and most of my cake decorations can and will be eaten. i also try to do everything as close to the date as possible. Fondant does not taste very good when it has been sitting around for a while. I even make ones that look like candy. I've had cakes with real candy on them, and it was unpleasant to try to eat it. In fact, my kids stopped eating the cake completely because it was too hard to eat with the candy on it! The trick is to still make it all yummy.
I recently had a friend show me a fantastic dragon cake that was at a party her daughter attended. It was really well done! Unfortunately the baker had clearly been more concerned about looks than taste, as even the 7 year old commented that it didn't taste very good!