Oliver Postgate, RIP
... because we didn't have the money for elaborate equipment we had to rely on the basic hand-writing of animation, laboriously pushing along cardboard characters with a pin. Thus we were thrown back on the real staple of television: telling and showing a good story, carefully thought out and delivered in the right order for stacking in the viewer's mind. Come to think of it I must have produced some of the clumsiest animation ever to disgrace the television screen, but it didn't matter. The viewers didn't notice because they were enjoying the stories.(More here)
The Clangers was a fine science-fictional ecological fable, conveying its message without ever becoming preachy. Many of its stories featured disruptions to the delicate ecology of the Clangers’ little world that were healed by cooperation and application of some common sense, and it used in its opening sequence the iconic picture of Earth’s lonely blue island of life, taken from the Apollo 8 command module as it orbited the Moon.
Readers from outside the United Kingdom who want to know more can find examples of his work here (including a clip from a Doctor Who episode in which the Master, the Doctor’s nemesis, appreciates the Clangers).