Hugo and the Really, Really, Really Long String By Bob Boyle
Hugo lives on the top of a hill and he finds a very long red string. He is convinced that if he follows the string he will find something wonderful at the other end. As he journeys about town following the string he makes new friends along the way, but what he finds at the end is a big surprise - it's from his unraveling underwear!
Lesson seed: Read this book to your first or second graders stopping along the way to have them make predictions about what might be at the end of the string. Then give them each some drawing paper. Have them draw a red squiggly line with crayon and then ask them to turn that red line into something else.