I wish more people would continue living youthfully into adulthood, and continue to do so for as long as possible, with the limits of old age being an emergent phenomenon forced onto them rather than something they unwittingly eagerly pursued through laziness and boredom. If you ride a bicycle every day, barring some injury forcing a prolonged break, you'll continue to be able to deep into old age. Anything we practi…
I wish there were more free playgrounds that can also be used by adults, spread around like the ones for kids. I also like ropeways, climbing high, swings etc. Instead adults get boring repetive-movement fitness equipment.
Like others have mentioned, it's fairly easy and cheap to erect some of these things at home, if you have your own property.