...by reading this.

If you have children... when you decide to have children and they are a teenager... while doing their homework, ask them to put on a pair of jeans and a sweater if it's cold, and walk outside your front door with them, tell them to look at the side, where people are walking by and cars are passing for a moment while doing nothing but seeing people and cars move leftwards and rightwards. Tell them that while they are inside working or doing anything else the world is moving as well. The exact words I used when I was three and convinced my father to walk outside with me is "See? While we are inside of our building moving around and doing things the world is moving." I think this speech should be rated E for everyone, so I'll leave it at that. You can say the same thing a second time when you walk back into your apartment or house, to see what the other person says.