Greenhouses. Ziplock bag, wet cotton balls and seeds. You can see all the plant parts. This has a printable for the "house". Although I think I might just tape the bags to the window and have a lot of them.
This resource could be incorporated into a plant unit in kindergarten or 1st grade. This is a diagram that students create to show the different parts of a plant. Students will create their plant and correctly label each part. I will use this as an activity to assess students to determine if they know the parts of the plants. #etlobest
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.