Here is an amusing way for time pass. If you are ever feeling bored and wanted to kill the time, visit Planefinder
In this website, you will see the world map based on Google maps. You will see red colored planes hovering over hundreds of countries. When you click on any plane, you will see that particular flight details that include, the flight number, destination, the name of airlines and its speed.
With Planefinder tool, you can actually track different flights as they happen in real-time. Just navigate by going through the major airport cities and zooming in and out to have fun.
The added bonus is you can know about various airlines and their speed.