When two children discover a herd of cows at the end of the rainbow they are disappointed as they were expecting to find gold. The film traces the journey of butter from cows grazing, to milking, to the final churning of milk into a crock of gold – packets of butter – much to the delight of the children. It is a simple delight, and moments like the creative sound mixing in the laboratory scene gives you a taste of Spence’s filmmaking talents.