We planted seeds in a bag in order to show the students how seeds grow and to better see all the parts of a plant. Before having the students plant their seeds I placed a paper towel inside a sandwich size ziploc bag. I then put a line of staples about an inch from the top of the bag to keep the seeds from falling into the water. The students then placed 3 beans into the bag and poured 3 tbs of water into the bag. I taped them onto the window.
The bottom row of bags are labeled "no water" and "no air" so the students could see that seeds need air and water to grow.