Growing vegetables from food waste is a great lesson for kids and also makes great science experiments Teach students how to regrow food and pick a food to regrow as a class. Could use a food from a students leftover lunch.
Herbs in frozen olive oil is one of my favorite ways to harvest. The herbs don't get dry, brown and brittle in the same way they do when they're frozen in water. They also retain their scent and flavor much more effectively!