From what I remember from my childhood (age 4-5) it was a lot easier to understand workings of analog components, particularly ones with some physical (or visua

From what I remember from my childhood (age 4-5) it was a lot easier to understand workings of analog components, particularly ones with some physical (or visual) interface that you could actually see. Like relay with visible moving parts, or voltmeter with moving coil/pointer, or oscilloscope, or a resistor that heats up and that you can touch, or a capacitor that makes a noisy spark when discharged. And on the opposite, digital components that were not giving any direct visual/sensory clues were a lot more difficult to understand (like 555). So, I guess, these extra visualizations can be really helpful at early stages. With more abstract concepts, like modulated wave, detector radio, etc (which BTW can be understood at 5 as well) I don't think that visualizations like these can help. In my opinion later stages really depend on abstract thinking and there is no way avoiding it.