Bob Ostrom
Bob Ostrom has written at least 6 books. Their most popular book is The Magic School Bus Blows Its Top: a Book About Volcanoes with 1 save with an average rating of -⭐.
 The Magic School Bus Blows Its Top The Magic School Bus Blows Its Top: a Book About Volcanoes
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 How a Library Works
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 The fire truck adventure
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 Scholastic's the magic school bus in a pickle
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 Step-By-Step Experiments with Sound
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 Step-By-Step Experiments with Electricity
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