Maarten van Steen is full professor at the Computer Science department of VU University Amsterdam, The Netherlands. He mainly teaches in the field of distributed systems, computer networks, and operating systems. Together with Andrew Tanenbaum he has co-authored a well-known textbook on distributed systems. Confronted with the difficulties that undergraduates in computer science have with mathematics, he set out to design a course on graph theory and complex networks that for most students would be less intimidating and much more fun than regular mathematics courses. His research concentrates