The big teddy bear or dino, can all build relationship with the child. I suppose later in the dynasty when most of the town has died off this can be quite useful. In sims 3 dynasty we allow players to use objects as best friend, I don't see why we can't do the same here - that is if you can maintain that relationship as good friend when it is time to eat Ambrosia. Let's see what the other team members think though.