Here is a short (but sweet) Prezi welcoming the kids back to school. It didn't take too long and Prezi has improved some of their features. For example, you can search for an image directly from the Prezi site instead of opening a new window and doing it through Google images.
I plan on showing this on my Smartboard and letting the kids ask questions as we go. Last year, I didn't teach them how to make a Prezi, but I may this year.