This is actually a very interesting question if you mean babies and not toddlers. I am thinking you will get the answer if the game has to provide a crib. Human babies should have the normal default crib, vampires should have the vampire one, spell casters should have the spell caster one and aliens should have the alien crib. I am not sure of mermaids or hybrids though. I would like to test this, I have a little free time on my hand so will see what I come up with ;)