Introducing Concepts Before Words (Friction Example)

I read this — I think it was a blog post — about the correct way to introduce topics to children. The idea: introduce the concept first, then the word for it.

The example used was friction.

You tell the child: when you rub a piece of wood against another piece of wood and then let go, the top piece stops. Why doesn't it just keep sliding forever? Because there are tiny little bumps on the wood on top and tiny little bumps on the wood on the bottom, and they bump into each other. If you keep rubbing, those bumps even create heat. This is the same thing that happens when brakes stop a car.

Now — after the child understands what's going on — you tell them: there's a word for this, and the word is friction.

The general principle: introduce the concept, then introduce the word. Not the other way around.

For the life of me, I cannot find this blog post anywhere.