We had to make “orange” play dough for Mason’s homework assignment. While the play dough was cooling, Mason decided he was more interested in making other colors using the food coloring. A lot of green and a few drops of blue made…well, green. In a quest to dye objects, I quickly turned him onto an experiment with celery I remembered reading in my Gadgetology book.
What you need: Celery stalk (that still has leaves), water, a few drops of food dye.
Put the celery stalk in a cup of colored water. Wait a few hours. What do you think will happen?