My students are filming a 1 minute video. In once scene they want to show a tablet with a list of thing written on it - in handwriting text is better, but printed will work. They want to show the words being "unwritten" as the film progresses. Does anyone have an idea how to do this? I was thinking, if I could connect a small tablet to an android tablet, I would write on the screen....then play the video in reverse... Any ideas?