Season 1, Episode 3
Materials
Air Date: 1978-04-26
Overview: This week Johnny looks at family trees, works out how to get rid of a boomerang, puts nylon in an endless spin and turns a fossil back into a dinosaur with the aid of an element that never forgets. Meanwhile - Think of a Number - a half is a third of it - what's the number ?
Runtime: 30 minutes
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