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What are these devices?


Outside a local school window.
I'm guessing it has to do with networking but I'm curious about why they're outside, especially as they're not that high off the ground and can easily be tampered with from the street.
Stickers on them read "ROCK" and "ROLL".

What are these wires on this water tower? What is their purpose?


Why are these wires on this water tower? What do they do?
Update:
Caught it with the curtain up!


This metallic surface application around the edge of a bluray-disc


The disc is otherwise printed like a "normal" Bluray, but there is this metallic quadruple ring on top. The image is from the "proof" of a scene release, so it might have something to do with being an early release.

Got this thing on my shower wall, looks like a leech, but is it possible (im in western Europe)?



The rocking chair in this photo


I remember it played a nursery rhyme like a music box when both armrests were gripped.
That’s my sister and I visiting my great-grandmother in her infirmary in *1975. The chair wasn’t meant for visitors, but for children housed in the infirmary.
The chair had metal armrests that acted like actuators, and a metal box under the seat that played nursery rhyme songs like a music box when both armrests were gripped and the chair rocked.
Was this a common thing, perhaps mass-produced, or just something jerry-rigged by some guy?
Have you seen anything like this? Thanks!
(Sorry for reposting; my post went wrong last time.)