there has been a lot of stuff written on this...
i'll say that it is of varying degrees of helpfulness, however.

one way of thinking of the kid / the inner child / little girl is to think of her as a part of you. most (reflective) adults can connect with an apect that is little, it is just that this aspect can be more pronounced in people who had disturbed upbringings.

do you do anything to try and nurture your inner child? sometimes people find that can help them.

my inner child sometimes clues me in when i'm fragile and need to take extra care of myself.