I used to climb up the sides of an old slide like this not the steps to get to the top. These was tarmac underneath that I could have fallen down onto, but I didn’t. Goodness knows why I did it. I also used to hang upside down from the top bar of the swings. I would climb up via the three legs holding up one end and then climb over. I don’t know why I stopped, maybe I was told it was not a thing girls did!
At the end of term at school we used to play pirates in the gym. They would pull the wall bars out and lock them in place and there were three or four ropes hanging down from the ceiling. The challenge of pirates was to play three dimensional tag. I would climb up the bars or a rope and if anyone tried to get me I would reach over and climb onto the next rope! I often was the last person standing (or hanging!)
Photo courtesy of a friend, hope that’s OK?