Playing in the winter snow calls for hot cocoa Explore early math concepts as the friends try to evenly split some tasty marshmallows. Caldecott Honor winner Grace Lin celebrates math for every kid, everywhere After playing in the snow, Olivia and Mei are ready for cocoa. There's one marshmallow for Olivia and one marshmallow for Mei. But what will they do with the third marshmallow? How can two friends share three things fairly?...