Jimmy demonstrates how to make gelatine by using acid to break down the collagen found in pig skin and trotters. He then uses his gelatine to make marshmallows, one of the many products found in supermarkets which use gelatine as a key ingredient.

This clip could be used to develop knowledge and understanding of the origins of the ingredients in common food products. The clip could be paused near the beginning where Jimmy asks the question 'what is the connection between pigs and marshmallows?' and students could discuss their ideas.
Following the clip, students could be presented with a range of common products and asked to investigate the gelatine levels. This could be used to further illustrate the function of 'unseen' animal-based ingredients in foods that might not be associated with meat.