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Otis and Olympia go to Oona’s lab because they need a gadget that is lighter than a shuttlecock. They start weighing different items with a small pan balance but they don’t succeed. Oriele and Orielle ask Oona for her smallest gadget. Oona gives it to them. However, Otis and Olympia deduce that the smallest is not always the lightest. Oona gives them the lightest gadget and they win!
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