有天早上Jim沒來由地感覺到心情很鬱悶，看什麼都不對勁，整個人顯得非常沮喪。森林裡的動物們遇見，跟Jim說" It's such a wonderful day, Why are you grumpy?"  說著說著，好像Jim不得不假裝開心了起來....但即使如此他心裡仍然是不高興。

動物們給了許多點子，讓他可以感受到愉快的小方法。例如像河馬般在水裡泡澡、像斑馬一樣攤懶在地上、像青蛙般跳躍...一言一句快把他搞瘋了!! 
I'm not gurmpy!!!  放肆完情緒之後，他忽然覺得有點愧疚和難過.....他不懂為什麼自己會有這樣的情緒...直到他遇見另一隻大猩猩....

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這是一個和孩子討論關於情緒的好書，情緒有時候會莫名的來，也可能莫名的走。即便如此，他的感染力更是驚人，無論你是否開心是否難過，都不要佯裝自己，正式自己的情緒才能好好解決它～

Jim the chimpanzee is in a terrible mood for no good reason. His friends can't understand it--how can he be in a bad mood when it's SUCH a beautiful day? They encourage him not to hunch, to smile, and to do things that make THEM happy. But Jim can't take all the advice...and has a bit of a meltdown. Could it be that he just needs a day to feel grumpy?

Suzanne and Max Lang's hilarious approach to this very important lesson is now in a toddler-friendly board book format! It is an excellent case study in the dangers of putting on a happy face and demonstrates to kids that they are allowed to feel their feelings (though they should be careful of hurting others in the process!).