I doubt I would get to talk to me. When I was six I did not trust any strangers. I thought my brother was an idiot to just walk up to people and tell them his name, address, phone number, how many dogs we had, well, EVERYTHING.
If I did manage to strike up a conversation I would NOT ask if the cat got my tongue. I would tell me that the world is huge, with more people than I can imagine, and lots of them very different from each other. I would say there not only tons of people, there are constant changes I would tell me there are so many changes happening in the world, the world would be an entirely different kind of place by the time I grew up. I would make me promise not to believe anybody that my dreams are silly, because I would need those dreams to make my life happy when I grow up.
I would make a promise to me that if I got good grades in school all the way to graduation day, and ask a HS counsellor what unusual jobs could I learn,about, I would have a very happy life.
I would tell me that not all grownups are the same, and that lots of them are wrong about many things, just stay out of trouble until I got to be a grownup, and then I would be free to be as happy as I choose.