Memories of childhood

When I was a kid I was a big fan of Meccano kits. Probably one of my dearest moments were when playing with those stripes of perforated steel, screwing and unscrewing and creating something playful. Couple of days ago, I bought this as a gift for a friend of mine that is close to 40. Of course, to the delight of his two boys, assembled in one evening and played with by both of them: