Scoring to video


I teach music through composition in a high school tech lab. I have a new project where students import a QT file I created of their choice from public domain cartoons with characters dancing. About a minute long. I created the QT files/excerpts of the cartoons and there is no audio. The project is for them to create music to the video. The problem: How do we create the tempo for the dancing? Do I have the kids create a tempo map, compose to the tempo map the beat map for detail and accuracy? I appreciate the help.:confused: