Is there some free online circuit simulator where I can see see the electrons fluxing,imitating real-life circuitry?
Doing a quick search on EE.SE I found: Free circuit simulator for educational purposes
Falstad seems to support animated electrons, and it is free.
However, if you are willing to shell out 10 bucks, I highly recommend EveryCircuit. It supports
- Adjusting component values mid-simulation and seeing the effects in real-time.
- A large variety of components.
- Intuitive, and smooth animation: i.e. the electrons move faster for large currents/small currents, LEDs have varying brightness.
Here's a screenshot of EveryCircuit:
There is a free app version and an online version also.