Check out ARBasketball. It is an AR (Augmented Reality) basketball game. Download the app to your iPad and print out the marker (pdf file) located here: http://augmentedpixels.com/arb_marker.pdf. Hold your iPad over the piece of paper and a virtual basketball hoop will pop off the page so you can shoot baskets from your iPad. What a great way to teach probability or addition and WOW your students.
Check this one out!!!