Thanks to the super popular Angry Birds game, students have a pretty good concept of non-horizontal projectile motion.
This article from PBS is very helpful when thinking about how to implement the game into your instruction: Teaching Physics with Angry Birds
Another great article from Wired.com: The Physics of Angry Birds
Google Chrome provides an online free version of Angry Birds (can be used with any browser, however). This makes a great Friday or day-before-break activity.