Hi, I'm trying to understand this concept in order to explain it to a child. Let's say I have a battery with a copper wire attached to each end of the battery terminals. No bulbs, no resistors, etc in circuit - just a wire. The battery creates an EMF that moves the electrons in the copper wire, starting from -ve terminal of the battery towards the +ve terminal of the battery. This flow of electrons is what constitute an electric "current". Soon, more and more electrons are at the tip of the copper wire near the +ve terminal of the battery. My question: will the electrons then move from the copper wire *into* the battery via the +ve terminal? Will new electrons from the battery go *into* the copper wire via the -ve terminal? I'm asking this because I'm trying to use the bicycle chain as an analogy for such an electric circuit - in that electrons are already in the copper wire, and when the paddle moves, all electrons move simultaneously in one direction, and relating to my question above, the conservation of charges - where electons come into the wire at one end, and leaves the wire at the other end. Hust want to check if this understanding is correct. Thanks for your help!