I grew up on a trampoline.
When I was a kid, trampolines were not common. We had a big rectangular one in our sideyard, and we didn’t know anybody else with a trampoline. My sisters and I (and friends who came over) spent hours, days, years, on that trampoline.
Seat drops, back flips, swivel hips…or just lying on our backs, looking up at the sky, talking.