(This is called the triboelectric effect, and it's the reason electrostatic dust filters work. It's also the ... the race to ...

A smart plug basically connects a home appliance to an app via Wi-Fi, so that you can control when to switch it on or off ...

So, Greg, that circuit that we made, would that work in ... circuits at home? How do you think circuits have changed our lives? What would our homes have looked like before electricity was discovered?