For today, I'm going to share a kid story from long ago, when my daughter was about 4.
One day as I was driving and put on my turn signal, we had a conversation that went something like this:
Daughter: Mommy, what's that arrow that lights up?
Me: That blinking light? That's the turn signal.
Daughter: What does it do?
Me: Well, you put it on when you want to make a turn, and there are lights outside the car that blink and let the other drivers know you are going to turn and that way they know to slow down and not crash into you. The light inside just reminds me that I have the turn signal on.
Daughter: Oh. ... How come Daddy doesn't have those on his car?
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You can learn a lot by listening to young children.