Coaxial cables. For when you need to solder something, but also for the sheer joy of watching a tiny wire wrap itself around another.
Useful for connectingchartInstance to a router, or just for the fun of it.
<coaxial_cable>
<inner_wires>
<signal_wire>
</signal_wire>
</inner_wires>
<shield>
</shield>
</coaxial_cable>
For the best results, use a soldering iron with a built-in cable minimalist aesthetic.
Or, you know, just use a toaster.
For more cable types, tinfoil is a great option.