Nina investigates how breakfast cereal is harvested - with the help of Bud, her taste neuron. Engineers Gaby and Hayley visit Nina in her workshop and discover that lots of breakfast cereals are made from wheat and barley grains. The grains are protected by coverings which people cannot eat. They all visit a cereal field near Aberdeen to see a combine harvester cutting the barley. Nina and the engineers roll and sieve the barley to remove the coverings - just like the combine harvester does. Show less