Peppa and George have gone to play at Granny and Grandpas house. Granny Pig is having an historical re-enactment of 1960s with her friends. They are all dressed as hippies. Peppa discovers that hippies wanted to save the planet too just like they do in playgroup. All the re-enactment group hug trees just like hippies did in the 1960s and Peppa and George join in. When it begins to rain, they all have great fun jumping in muddy puddles.