There are 254 different flags in the world, covering all countries and dependent territories (including the United Kingdom and Kosovo). If that’s too many for you, the flags of the U.N. members ...

It all happened about two weeks ago when we were in a supermarket and we purchased a big poster of flags. My wife and I taught Aazer to identify the names of each country from its flag.

The U.S., France, Chile and more all have this commonality: red, white and blue flags. Here's why, as explained by Ted Kaye of the North American Vexillological Association.