We all tell our children that happiness is a choice, and here are the books to help you prove it! We've compiled a list of our favorite 30 books that exemplify choosing cheeriness, because this lesson is never too early to learn, and you can never have too many reminders. It's hard to learn to regulate your emotions (just ask any two-year-old!), and if we're being honest, it's something we're even mastering as adults. These books are great way to learn and reinforce the knowledge that we control our emotions, no matter our circumstances. To quote Leo Tolstoy, "If you want to be happy, be."