Scratch tutorials. You can download scratch for free for Linux, Win and Mac from http://scratch.mit.edu
- http://scratch.mit.edu/projects/16562097/ Throwing ball demo
Scratch 1.x (offline version)
You can find other (older) tutorials of mine at the site videos.
If you can't get the tutorials running on your own, you can download the functional code from here: http://scratch.mit.edu/users/horstjens