Chris Hadfield, the ISS astronaut that became the world's favourite after he started tweeting and showing offon YouTube from space, is now firmly back on planet Earth and has written a book called An Astronaut's Guide to Life on Earth. And in an effort to launch it without making a typical boring, pushy ad, Hadfield challenged his son to create something a bit more interesting.

Here's what he came up with. Spoiler: It's brilliant.