Polly's pen pal, Ally, is 125 centimeters tall, weighs 25 kilograms, and lives 450 kilometers away -- and Polly is determined to find a way to visit her! A story of long-distance friendship introduces basic metric measurements to children.
艾莉是波莉的筆友,她身高 125 公分,體重 25 公斤,住在離波莉 450 公里遠的地方,而波莉決定要找機會拜訪筆友艾莉!本故事透過遠距的友誼,幫助孩童了解基礎的公制單位。