Make Flowers Change Colors - Fun Stuff To Do Anywhere
All you do is add some food coloring to a vase of water, then add your flowers. White flowers tend to work the best - make sure to give then a fresh cut stem before putting them into the colored water. Although, kids will often use a celery stalk as well. I think it's better if there are some leaves still on the celery as opposed to the pre-cut ones.
This experiment shows how plants pull water up through their stems into their petals