I used this as a science experiment when I was student teaching in first grade. I used different colored food dye, water, and empty container/water bottle, and white carnation flowers. I put the dye in the water first then put the flowers down in the water. I let the students predict on the first day what they thought the dye would do to the flowers and throughout the week we watched to see what the flowers would do. By the end of the week the flowers were different colors. Pretty neat!