Because Amelia Smiled by David Ezra Stein
Because Amelia smiles, Mrs. Higgins sends cookies to her grandson. This kindness inspires a smile and a gift, too. Pretty soon Amelia's smile has set off a string of kindness. The colors and movement of Stein's illustrations dance around reader as they're taken around the world to see the glorious effect of one good thing in this inspiring picturebook.