Everyone has an inner child that is with them for their whole life. From a quantum physics perspective, the 4th dimension is time, where your childhood is still happening. If something bad has happened in your childhood, you can feel it still happening right now. It is something you have to heal.

The sad reality is that from the perspective of a Buddhist or a Hindu, life is supposed to be "play", maybe not childish but playful, like a sport or a dance, and in a strange way we are almost our childhood selves playing as adults.

Maybe it is possible to hug your childhood self. Maybe not physically, but mentally and emotionally, I don't see why not.

Children are not supposed to be hurt in ways that ruin their entire life, this is such a problem in the modern first world that it might be the source of all of our problems.