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Picture Book, 2019
Current format, Picture Book, 2019, First edition, Available .
Picture Book, 2019
Current format, Picture Book, 2019, First edition, Available . Offered in 0 more formats
When the invention hunters, a group of globe-trotting invention collectors, visit a construction site in their flying museum, a boy helps them by explaining how simple machines like levers, pulleys, and cranks work.
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