I saw this on a Home Depot commercial. I thought it would be a cool project for the girls, but how cool would this be if it were all peppers?!?! It would grow but you'd probably get a bunch of tiny plants with tiny pods since the root system wouldn't have much room.
http://www.youtube.com/watch?v=6_YeLnSjdcg
http://www.youtube.com/watch?v=6_YeLnSjdcg