[cycomachead]

All correct! That's pretty much it!

Snap! is designed to allow students write code in the same way they might in Scratch, but then move them on to exploring CS concepts. It's also somewhat more extensible, including allowing people to make blocks pseudo-natively in JS. (We don't really expect students to do this, but it's a great way for instructors to build tools for assignments or just experiment with ideas not yet in the language.)