Some great sites link to questionable sites. Your Students Plants need soil, sun, and water. Draw them in with a diversion. Hide the real crop. Mix on and off computer activities.
Some flowers have a great smell and taste.
Use the tools that others have invented. Coordinate Lab Use Lettuce is ready before everything else you need for a salad. You can never get the lab when you need it. OR Print it. Well water is free, share it with your friends.