The new craze sweeping old London town is window-collecting. All you need is a hammer, a masonry chisel and something to carry your collected windows in, like a wheelbarrow. Trade your windows with your friends. See if you can get a really big one intact out of a wall. Score high for windows from famous locations, like Windsor Castle, or for particularly large examples of plate-glass. One 11 year old boy from St. Ruperto's School for the Clinically Obese has already collected an impressive seven thousand three hundred and twenty-seven windows.