hi! aunty LaffingStock here. this is a good dream. very inspiring. such dreams have rotes attached to them and you may get one from time to time.
in psychology circles the child within is mentioned, that we all have one but somewhere in adulthood lose that sense of wonder and innocence. you must have dropped off some blocks somewhere and noticing you feel younger, more in control now.

also this child can be seen as your new energy body which is going to grow up and be self empowered, this due to the kung fu move I see you took.

in the movie, remember when grasshopper had to balance on one leg as instructed by his teacher? this is like getting control of energy body.
thanks for sharing