The how and why wonder book of beginning science
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Presents scientific principles of air, water, sound, and astronomy through text and experiments. Also describes how simple machines work.
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- ● children's books, science & technology
the long version
Presents scientific principles of air, water, sound, and astronomy through text and experiments. Also describes how simple machines work.
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"Presents scientific principles of air, water, sound, and astronomy through text and experiments. Also describes how simple machines work."
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