Thanks to an inspirational presentation by one of our County's middle school librarians, I decided to give Xtranormal a try this year in order to cover some of the more...ehem...drier bits of library lessons.
I signed up for the Basic (read: free) subscription and was able to create two similar videos with my allotted "XP" (Xtranormal points). My two videos featured the same robots and background; one was for my primary grade students and the other was for my secondary grade students.
The kids loved the videos! The younger ones were puzzled by the fact that the robot called me a friendly "robot". Why did it say that? It said I was a robot! What did it mean that I was a robot? Sometimes I forget how literal and how serious a bunch of first graders can be! They are so earnest! I cleared up any confusion and we were on our way to checkout!
If you go to the site in general and type in "library" or "library rules" or even "elementary library" you get quite a few hits. I have yet to explore them all, but I have a feeling some of them might be "borrowable" and cover some of the same topics I cover in my library.