More Big Book of Tell Me Why. 3 volumes in one. Barnes and Noble book. This books answers questions like: How were time zones decided? What is origami? How does water put out fire? How fast does our blood flow? What makes hair curly? Why does a cactus have spines? Do fish ever sleep? Why does swiss cheese have holes? Why do new babies cry so much? What do monsters eat? What do am and pm mean? Answers to hundreds of questions chiildren ask!