The making of a rope making machine is underway for the magnificent theatre company ‘The Grand Theatre of Lemmings’. An interactive show: children will be able to turn twine into rope by turning the handle of this machine – a clever time-honoured design. Shown here are the pulleys which will be driven by a leather drive-belt. Interestingly the pulleys need a convex edge to stop the belt drifting off. Counter-intuitive?