I really loved going to the secondhand book store with my dad, and perusing the books there for hours. It was even more heavenly than going to the library, because they had so many more books that I was interested in. Afterward I would visit my grandma, who lived near the bookstore. She would lend me her library card, and I'd pick up a bunch of books to read at home.
I also used to love reading my dad's computer magazines, and learning to program. Basically I was a nerd. Back then information wasn't nearly as accessible as it is now, and reading a magazine would often blow your mind. I've had many magazine subscriptions in the years since, and have never experienced anything like that.
What's your favorite childhood memory?