There should be an option for realistic electricity in the options menu

What should happen is in this mode the positive side of a battery would be an element like p-type siscon and the negative side could be n-type silicon, each conductive material would have "electrons" inside of them, when those materials are connected to the battery then the negative side would attract the "electrons" inside of the materials to that side and the positive side would push them awawy. Another option would be to visualize these electrons moving inside of the conductive materials, a thing about this mode is that the conducters should not conduct unless the conducters are touching.

If this were a thing then actual transistors could be made with the p and n type silicon, what could be added could be voltage, and with voltage there could be overheating of elements with enough voltage. Another option could be light being produced with the n-type and p-type silicon conducting.

So the electrons would flow from the negative side to the positive, so there can't be any current if the other side of the battery terminal is not connected, if the electrons are simulated.