Learn how to write HTML, CSS, and JavaScript and build your own website, app, and game! An essential guide to computer programming for kids— by kids.Crack open this book and set off on several fun missions — while simultaneously learning the basics of writing code. Want to make a website from scratch? Create an app? Build a game? All the tools are here, laid out in a user-friendly format that leads kids on an imaginary quest to keep a valuable diamond safe from dangerous jewel thieves. Presented by Young Rewired State — an international collective of tech-savvy kids — in easy-to-follow, bite-size chunks, the real-life coding skills taught in this engaging, comprehensive guide may just set young readers on the path to becoming technology stars of the future.