I had a big blue wagon, no brand I remember. We'd load it up with I-don't-remember-what and pull it around the neighborhood to various "secret" spots. One was an open space in the middle of a large bush. Around this same age, we'd steal oranges off the tree in my neighbor's front yard (CA).

As kids, we had zero respect for property boundaries, we'd hop fences to play with dogs and play on swing sets we didn't own, cut across yards, climb any tree we wanted to. I don't remember anyone giving us grief for this--except for stealing the oranges, but we were just quieter about it after that. The neighborhood was our playground, and so many houses had kids, it was almost like we were one big family.

Before I could ride a bike, I'd hang one leg out and push it around, steering with the handle.