I also learned to ride a bicycle on a BMX. It was in my childhood in Budapest.
I currently do not remember the year exactly. Probably it was around the early/middle/late 2000s.
I remember practicing in Budafok (in the XXII. District of Budapest) on the streets around the government house, in which we lived in that time.
Nice! The BMX culture is still alive and well. Does your cave community have a few bikes? I would imagine a bike would be very useful where you are now since the weather is mild most of the year.
Yes. We had bikes in the past, and we even had a bike storage wood building.
The bikes became broken over time, and no one had either time, money, resources, or skill, or simply mood to repair the bikes.
The community modified the wood bike storage building to an accommodation months ago.