Engineering~Math~Art~Science These 7 STEM/STEAM plant and flower activities and challenges are a perfect way to integrate more STEAM strategies into a plant and flower unit. These activities can be used throughout a unit as each topic is covered (parts of a plant, life cycle, pollination, etc.) or at the end of the unit as culminating activities. All the materials needed are inexpensive and easy to find and probably already in your classroom (cotton balls, pipe cleaner, construction paper, paper