You can do this with too many vegetables to name! Seeds are easy to plant and watch grow, of course. But you can also chop off some vegetables and plant them into water or dirt and they'll regrow their leaves! Try this with lots of herbs and veggies, including (but not limited to): romaine lettuce (pictured), chives, rosemary, celery, cilantro, lemongrass, scallions, and onions. Watch this tutorial to see the process in action and click here for a full guide.