Is It Stiff or Bendable?
$29.99
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A pencil is stiff. A rubber band is bendable. Why are some objects stiff and others bendable? Find out in this series about materials and their properties. Informative, at-level text and engaging photographs help readers understand the differences between stiff and bendable objects.
Is It Stiff or Bendable?
$29.99
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$29.99 each