When I was a kid, I conceptualized a post-apocalyptic story entirely starring Barbie dolls. One idea I had about how they would live and get around involved transmission towers, or power towers. Imagine something like this. Note: By the time they started living there, the power lines had long since stopped working.
These dolls would be as smart as humans, but can only lift about 5-10 pounds. They're functionally immortal, since only way to kill one is to completely destroy it by setting it ablaze. They eat, drink and sleep to maintain their energy levels and keep their strength up. Not doing it won't kill them, but will make them very tired and weak.
The idea was that somehow they were able to live in different parts of this tower (with branch platforms or nets and hammocks) and get to different floors with stairs or an elevator up the side or down the middle of the tower.
However, the main benefit to living in this power tower that I thought of was to create a system of Gondola lifts or Cable cars to travel from one tower to another with the power tower's wires. Looking back I don't see how I thought that was supposed to work. But that's where you come in!
How could a society of Barbie dolls build and maintain a system of Aerial tramways connecting a bunch of power towers?