[Not entirely off topic] Marbles

Those who have visited the loos at Pinewoods Camp will likely remember the joy(?) of playing with the marble runs on the walls whilst sitting on the 'thrones.' At last they beat reading a book or newspaper or even doing Sudoku. Anyway - the Mousetrap Game not with standing - marble runs and racing has become a craze even reported by the BBC. http://www.bbc.co.uk/news/magazine-36040254 CJB.