I would like to add to this post that there are other reasons why a person would collect or treat themselves to a 'child-like' item:-
a)not everyone has been lucky enough to have an idyllic childhood, some childhoods are hard and brutal, and to be 'survived' rather than 'enjoyed' - as a result in adulthood it is common to 'give yourself' the items that you went without. It is a form of comfort and 'putting things right'.
b) some people had such a good childhood that having items that remind them of their childhood comforts them, when the adult world gets hard to bear (pardon the pun).
I won't say which one I am and I do not have a teddy bear, but am not averse to getting one, if I see one with a face I like - but I do have fleecy printed pyjamas, my childhood books, and a few other items that I would never give up and I don't at all care what people think, because they have not walked in my shoes. I say whatever makes you feel good/better do it, goodness knows life can be hard enough.