Etan Boritzer's 5th book in his best selling What is? series of children's titles dealing with life concepts asks children to consider the various contradictions in laughing at others, as well as the possibility of laughing at oneself. Gently suggesting a thoughtful approach to tolerance through humor, Boritzer (b. 1950) presents a subject we take for granted and looks at the various subtleties of what laughter is really about. Illustrated by Jeff Day to reflect the diversity of today's children and adults, the images and message here is one of positive values, compassion and acceptanceEtan Boritzer的第五本暢銷書是什么？一系列涉及生活概念的兒童稱謂，要求兒童在嘲笑他人時要考慮各種矛盾，以及嘲笑自己的可能性。博里策（Boritzer，生于1950年）輕輕地提出了一種通過幽默來寬容的周到方法，提出了我們認為理所當然的主題，并探討了笑的真正含義的各種微妙之處。杰夫·戴（Jeff Day）所描繪的圖像反映了當今兒童和成年人的多樣性，此處的圖像和信息是積極價值觀，同情心和接受感之一。