Stéphane Ducasse, "Squeak: Learn Programming with Robots by Stйphane Ducasse"(repost)

The goal of this book is to explain elementary programming concepts such as loops, abstractions, composition, and conditionals to novices of all ages. It teaches the core programming concepts based on simple problems, involving the manipulation of robots or "turtles" as frequently seen in school learning environments. The ideal reader wants to have fun programming. And the reader does not have to be fluent in any programming language before they pick up this book.