"Gramma Tinker is acting strangely -- even for a really old caterpillar who is always inventing things. One day, worker ants Leaf and Lu, who often visit Gramma in her cherry tree, are fascinated to find her creating what she calls her greatest invention yet: the Wingmaker 77. What could Gramma Tinker be up to? And why did she invent a wingmaker?"-- Provided by publisher
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