Disagree. I once had a conversation with a sibling who was trying to understand logic gates, and I ended up using a verbal explanation of a very similar setup (

Disagree. I once had a conversation with a sibling who was trying to understand logic gates, and I ended up using a verbal explanation of a very similar setup (in my example the AND gate was a pipe with a hole in the bottom just big enough to drain one but not both of the potential incoming streams, and another hole partway up leading into an output pipe). I think pipes can provide a useful example that seems more real and tangible than semiconductors. As an aside, I've heard/read more than one source use water as an analogy for electricity -- I think it can help people reason about, for example, friction impeding rate of flow before they're comfortable enough thinking about electrons that this would make sense intuitively.