As others have mentioned above, I look back at the witch’s hat I used to play on in the '70s with amazement - how we ever survived I will never know:
I used to climb up the side bars and sit on the top of the cone. That’s an open cone - sat on top of a smaller solid cone - creating an ever changing maiming space underneath. Luckily I still have all my extremities…
The other one was the geodesic climbing frame. We had a pretty big one at primary school, luckily over grass - I slipped off swinging on the bars on a very cold day, and landed right on my coccyx. Got up, staggered across towards one of the dinner ladies (now walking on asphalt) - only to pass out and use the ground as a cheese grater on my face