Little blue and little yellow share wonderful adventures.One day, they can't find one another. When they finally meet, they are overjoyed. They hug until they become green. But where did little blue and little yellow go? Are they lost?
最好的朋友小藍和小黃共同經歷了一次神奇的冒險。有一天，小藍找不到小黃了。當他們終于相遇的時候，他們開心極了。他們抱在了一起，直到變成了綠。可是，小藍和小黃到哪里去了呢？他們消失了嗎？

"An unusual, imaginative, stimulating, and appealing picture book." -- -- The Horn Book