There are so many:
Playing outside til dark and riding my bicycle all over the town without fear!
Walking to grade school by myself without fear.
Meeting someone and actually having a conversation without the internet.
Catching fireflies and putting them in a jar for a "light", and then releasing them of course.
Playing on the school playground on the old jungle gym, teetertotter, and high slide.
High school proms in the HS gym which the 11th graders made something special for a theme.
Riding the muscle cars of the 60's with no seat belts, and going over the bumps!