[Lukman]

http://www.tynker.com. My daughter started with Scratch Jr. When she turned 9, we got her a chromebook for her birthday, and I read about this site in a WSJ article. She took to it right away. Kids can progress through extensive programming-puzzle tutorials and make their own projects, using a "block" language, python, or Javascript. They can switch between the three supported languages within projects. She is still most comfortable with the block style, given that it abstracts away free-form syntax, but has started working through the python tutorials. A year later she has made dozens of her own projects (mainly simple games) of increasing complexity, which can be published and shared with other kids. She now understands relatively complex concepts like generating random behavior, method calls, variables and even physics engines. Highly recommended.