On a lighter note, there have been quite a few newspaper and magazine articles on regenerating vegetables to get second use out of them.
So I submersed the root from a "living lettuce" in water. After a week, there are a few leaves, but will it ever be a salad?
An inch of the root end of a scallion did grow new green leaves, so if you wanted free "chives", it is marginally worth your time.
Perhaps an interesting exe4cize for kids,