All I can say to the young players is, enjoy every moment of it. Just enjoy every moment of it. Your career goes by very quickly.
There's only one test of a great children's book, or a great children's film, and that is this: If it can be read or viewed with pleasure by adults, then it has the chance to be a great children's film, or a great children's book.
If I had to start over, I'd pursue photography - probably to the exclusion of acting.