App Inventor is a free, user-friendly tool that makes it a snap to create Android apps using Android devices such as phones and tablets-no programming experience needed. Users decide what they want their app to do and then click together the colorful jigsaw-puzzle blocks that make it happen. After the project is finished and tested, App Inventor turns it into a real Android app that can be run on phones, shared with friends, or even sold in the Google Play store. Hello App Inventor! Android programming for kids and the rest of us introduces creative young (and older) readers to the world of mobile programming-no experience required! Featuring more than 30 fun invent-it-yourself projects, this book starts with the building blocks needed to create a few practice apps. Then, it teaches the skills needed to bring app ideas to life. Throughout the book, a special Learning Points feature makes sure readers understand important programming concepts used in any programming language.