That was the most awesome part when I was a kid, I remember the first time I played with the electronic components of an old toy, I remember being amazed about

That was the most awesome part when I was a kid, I remember the first time I played with the electronic components of an old toy, I remember being amazed about how a small switch worked the same way with a small led and with an electric motor, I was amazed about how every part could work independent from the whole toy, it was a really big discovery for me.