My son, now 2 and 1/2, had no toys in his crib till he was about 10 months~ then it was down hill from there!! He got into blue's clues, so he took every Blue in the house and had to sleep with them too~one was a big pillow, and another one was hard as a rock~didn't matter to him!! He once found a showerhead and decided that was his favorite thing and had to take it to bed too!! He is a bit of a collector, he finds things he finds interesting and then has to have them and take them to bed! The count is now up to 2 Blues, 2 tigers( he took those over), 3 blankets, and the newest is a robot! So I don't know that he "needs" any animals, but it may lead to a habit you don't want!!! I for one, pick my battles and take out whatever i think might hurt him after he is asleep.