Who or What am I?

I have a mouth, but I do not speak.

I have teeth, but I do not bite.

I have ears, but I do not listen.

I have a small nose, but a keen sense of smell.

I have two eyes, but I do not see very well.

I can be held, but I can not hold.

I have a coat, but I never take it off.

I am child-like, but I am very old.

I can catch a ball, but I cannot throw it.

I am alive, but I am not a person.