In this month's Science 2.0 column, Eric Brunsell and Martin Horejsi share an interview with Kathy Cady, a biology teacher in Winneconne, Wisconsin, who uses stop-still animation to engage her students. Stop-still, or stop-motion, animations feature a series of images with slight changes between each take; when these images are played sequentially, they give the appearance of motion. This column provides Kathy's tips and ideas for using this teaching tool in your classroom.