At first glance, wire seems to be a nondescript, rather boring material, too humdrum to be bothered with. The intensive occupation with wire in the film as well as in the accompanying material, however, makes obvious what significance wire actually has in our society. It is truly indispensable! Through the film, children get acquainted with the differences between modern and historic wire manufacturing. Moreover, they see how a bicycle is made and thus learn why bicycles are also called "wire donkeys".