This is a great, easy introduction to Gamemaker and object-oriented programming. Kids get to know the software by editing an existing game, building the platforms for the cool hero to jump around.
I've done this class with kids as young as 7 or 8, and it's always been fun. Kids see results very quickly.
Download the "guts" of a CD, link below, unzip the files and burn to a CD. The CD will auto-run with a menu that will run Gamemaker, with all the files you need for the class, and have the lesson plan available at the click of a button. Everything on the CD is free, so you can make as many copies as you like.
The lesson plan is original material; free for nonprofit use.
Click to view; right-click to download: