A curious and inventive caterpillar with an unusual technique for becoming a moth.Gramma Tinker is an old caterpillar who lives at the end of a cherry tree branch. Leaf and Lou, ant friends who live nearby, love to hear about her many inventions. One day, Gramma shows them her greatest invention yet: the Wingmaker 77. She is preparing for an adventure, and Leaf and Lou can't imagine what it might be --- especially when Gramma explains that she'll rest inside the Wingmaker for two weeks, and when she emerges she'll be ¿changed.¿ Why does Gramma need to make wings? And why is she studying flying creatures to learn about flight?Change happens. Being curious about it makes it fun!