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Un stylo peut-il écrire au plafond?
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S1 E26
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Our band of crazy testers wants to write the history of the show again! While David unravels the secrets of felt-tip pens, Elise explores the secrets of ballpoint pens in the factory of a mythical brand! Our scientist is inspired by astronauts' pens to imagine one that can write on the ceiling. Who will end up upside down?
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