On a cold, snowy day, Mimi and her older sister are walking home from school when Mimi realizes her hands are cold. She clamors to borrow her sister’s mittens, but her sister teaches her a trick anyone can use if they have a good friend nearby. If everyone used this trick, would the world be a friendlier place? Mimi’s grandma is not the only one with warm fuzzies by the end of Yoko Imoto’s Mittens.