I loved this activity. The reason I loved it so much because it was the children's ideas that propelled it forward. I had an initial intent that was more science based and they grew it into an art and nature exploration project. Try this with your kids - it's a great reason to go out and get yourself a pretty bouquet.
The parents weren't sure at first what their child was handing them at pick up. Yet the excitement in which they presented their creations to their parents was infectious and most parents smiled and gladly transported the nature art home.
The lesson I learned was to be flexible and allow for changes in my initial activity idea. When you follow the children great things happen!