Among Axel's most prized possesions is his "fugle-bold" which translates to bird-ball. This is a soccer ball with an image of two penguins. "Fugl" (bird in Danish) is one of the words that Axel for some reason insists on saying in Danish. Hence the ball was immediately named fugle-bold by him. Interestingly, when pronounced quickly it sounds almost identical to "fodbold" which is soccer in Danish so somehow it all makes sense.