Greenfoot is a visual and interactive environment used to teach object orientation with Java. Create ‘actors’ which live in ‘worlds’ to build games, simulations, and other graphical programs.
The Joy of Code is a programming course mostly in video format (often screencasts of actual programming sessions). It starts at the very beginning — assuming you know nothing about programming at all — and then progress through a sequence of many important topics.
Watch the first episode of Joy of Code on http://blogs.kent.ac.uk/mik/category/joy-of-code/