This is a wonderful flower matching game. For preschoolers, this would need to be a small group activity instead of an individual activity so that reading help could be given to the child. This is a great way to re-enforce the parts of a plant.
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.