This fun experiment details how everyday plants receive and process the life-giving water they need to thrive. With a few glasses of colored water, some flowers and a knife or scissors to cut the stem, you’ll watch as flowers drink up their nourishing water and take on new brilliant colors. **Why It Works:** Capillary action, or capillarity, is the ability of a liquid to rise through narrow spaces—in this case, a stem. In this experiment, notice how the petals begin to take on the same color as the dye you’ve added to the water? You can literally watch capillarity in action—although it is, indeed, a slow process. **Here’s What You Need:** - Three white flowers. We used Gerbera daisies, but you can use anything you have on hand or that is easily available at the florist or store: roses, carnations. Go pick some lawn daisies if you have them. If you don’t have flowers, celery works great as well. - Four glasses of water - Food dye: blue, yellow, green, red - Sharp knife