Right now it's available to you as a teacher, but I hope soon I can tell you soon it will be added to student iPads. For now, it's a great attention grabber if you create a video to present to your class. (It would also be a great incentive to earn; a student could earn a chance to create a "gami" video on your iPad, share it to their own iPad, and include it in a bigger project.)
This has so many uses across subject areas and grade levels! The great thing is you can save the video (30 second max with the free version) to your camera roll on your iPad. Then you can add it to other media in an app like iMovie for a longer project. Check out my Holmes School Tellagami to see how can put your character or yourself right into a location:
Download Tellagami for free from the App Store and check it out!