You'd think the water analogy would be easier to build and sell. Regardless, the more "analogies" the better, as the abstract concept reveals itself more readily.

When I was taking physics, the water analogy of circuitry helped me out a lot, especially with regards to capacitors and inductors. Inductors being like a water wheel, taking time to ramp up to speed then reinforcing flow of current (as I remember?). And capacitors being like a rubber sheet separating water. A strong current provokes a respective force against the water on the other side and slowly stretches the rubber until current stops; the key thing is it requires constant voltage to keep the rubber stretched; the elastic energy of the rubber is analogous to the stored electric field in a capacitor (?).

Physics was hardest for me... I preferred the more structural and compositional nature of computer science. Things changing continuously is hard for my brain :(