'Grain Pit' interactive exhibit, Science Museum, London, October 2000.
© Science Museum / Science & Society Picture Library
One of the most popular exhibits in the Science Museum, the 'Grain Pit' in the Launch Pad contains a variety of mechanisms for transporting grain around a closed loop. The conveyor belt, vibro-conveyor, Archimedes' screws and the bucket lift are all powered by hand. The system works best when a team operates in unison, with everyone finding their own role.