Disappearing Color Science
This is an easy, but potentially messy, science experiment.
-a clear jar -water -food color -bleach -a dropper
What you need:
Fill up your jar with water, leave a couple inches of room from the top. Add food color.
The next step...
Use your dropper to add a little bit of bleach to the jar of colored water. A darker color will show this best.
Watch the reaction.
If you do not stir it, it will start bleaching the water from the bottom up. You can keep adding more bleach until your water is almost clear.
How clear will the water go?