Grow a Lima bean plant in a CD case. Then label it with a paint pen. So clever, A sharpie would work too! I wonder if the super thin case would work as well as the older thick? I think you would have to find a very thin bean!
Spring and flower science bulletin board idea: Love this growing plants display - very creative! Could do one main flower (sunflower) stem out of a pool noodle and students' art along with it- very cool idea.