Be a Guinea Pig and Play Tetris!
1. Play Tetris.
2. Play Tetris while talking to someone on the phone. Don't talk about the game you're currently playing, though.
3. Send her your scores (off the phone and on the phone). (Also send if you've played Tetris before or not, your age and gender, and where you're playing. (These could be variables that affect the data.))
That's it, really. So, remember, you're not wasting time. You're helping a teenager with her science project.