Publisher's Synopsis
This is a story about protecting the atmospheric environment. On a hazy northern winter morning, a little boy exhaled a hippo-shaped elf on the way to the kindergarten. This hippo is clean, transparent and full of curiosity about the world. He is eager to find a good friend like himself. However, because of the smog, the pedestrians on the road wear masks, and no one will breathe out... My good friends are actually fresh air, blue sky, free breathing... This is a story full of children's interest and imagination. This is a story full of children's interest and imagination. In the process of reading the story, the children will be guided to think, act, and protect our environment.
