O que significa "in one's second childhood"?

The expression of the day is very interesting because everybody is going to relate to it. You know those days when you're feeling like a child and want to do things adult people normally don't do? Our expression has everything to do with that feeling. Imagine, for example, you've always dreamed of going to Disneyland but your parents couldn't afford the trip when you were a child. Now you're all grown up, can afford your own trips and everything in your life has changed except for one thing: you still wanna go to Disneyland. One day, when you finally make it there, you're so blown away by everything in the place that you start acting like a child. People around you say you're in your second childhood. But wait, what does that mean?

When you're in your second childhood, you're interested in things or people that normally interest children. Can you remember of some examples of your own? C'mon! Everybody's like that at some point of their lives. For instance, if you still have your grandmother, don't you feel like you're back in your childhood every time you're around her? Let's suppose you spent the whole weekend at your grandma's and now you're back home talking to a friend of yours. He wants to know about your weekend and you say: It was awesome! Every time I spend weekends or holidays at grandma's, I feel as if I'm in my second childhood. We make cake, I go to the river and throw stones, she tells me all her stories and it's awesome. That's it for now guys. Talk to you next time!