Rope loop model (who represents what part of the circuit)
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You might find [this article useful](https://spark.iop.org/rope-loop-electric-circuit-model).
The rope loop model is an analogy for how a simple electric circuit works. Personally I prefer a [log flume-based analogy](https://en.wikipedia.org/wiki/Log_flume_(ride)), but that is harder to demonstrate in a classroom.
Anyway. You get a loop of rope. Everyone holds it up. One person pushes or pulls the rope around in the loop. One (or more than one) person holds down a bit on the rope.
This is meant to demonstrate a simple circuit. The rope represents the electrons, the person pushing the rope around represents the power supply, and the person holding down represents some kind of component providing resistance.
It’s useful because it shows that the power supply isn’t generating the electrons, it is merely moving them around. The whole rope moves together at the same speed (current is the same throughout the circuit). It shows how a single bit of resistance anywhere in the loop slows the whole thing down, and if you add more resistance you get more of a slow-down. It shows that the rope isn’t “used up” or spent in any way, all it is doing is being used to transfer energy from the person pushing/pulling it, to the people holding down on it.
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