Seems as fair a test as any to me (I'm not biased by scoring 3/3, honest! ) - I've never met Clangers fan that didn't seem like a nice person!
And not just "entertainment", either - I never heard a more relaxing male voice than Oliver Postgate (narrator in the 2nd and 3rd clips); far better meditation than all those annoying "whale music" relaxation tapes! Educational, too - despite the passage of many decades, I can still speak fluent Clanger!
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When you are fighting an invisible monster, first throw a bucket of paint over it.