If You Give a Mouse a Cookie by Laura Joffe Numeroff is an adorable story about what happens when you give a mouse a cookie. It teaches a valuable lesson about the cause and effect of giving an inch, and taking a mile. Mouse is given a cookie, but then he needs milk. When he gets milk, he needs a straw. So forth, and so on.
Use in classroom: I would use this book in the classroom to teach children how to determine the cause and effect of a story. I would ask, "Mouse needs a milk, so that is the effect of what happens when he is given a cookie. The cause of Mouse needing milk is that he got a cookie, and he needs something wash it down. We know that cookies can sometimes make our mouths sticky, or dry."