Watch We Grew A Frog (1970) : Full Movie Online Free An educational film intended for children from 6 to 8 years of age. ‘We Grew A Frog, 1970’ tells the story of two schoolchildren, Lynne and Martin, who collect frog spawn from the village pond, take it to school, and there, in a tank, watch the spawn grow into frogs. The film shows in close-up the developmental stages of the spawn-to-frog process. This educational film features the pupils of Whatfield School in Suffolk. Headteacher, Gwen Dunn wrote and told the story.