PLEASE READ BEFORE PURCHASING!This is *NOT* a "no prep" activity. It requires a green screen, if used in the way photos appear, and the downloading of an app from an Iphone. In addition, there are other item like a tripod I suggest you purchase to complete this. It also requires at least two hours of time on the teacher's part to prepare your students for this activity. However, it is completely worth the time and money. This took my students about three days (one hour each day) to complete, aft