What you need:
• Clear glass or Jumbo Test Tube
• Pipettes or droppers
• Sugar
• Measuring spoons
• Food coloring
• 4 small cups

What you do:
• Fill your cups with 1 cup of warm water and add food coloring to the water.
• Add 2 tablespoons of sugar to the 1st cup, 4 tablespoons to the 2nd cup, 6 tablespoons to the 3rd cup and 8 tablespoons to the last cup.
• Label each cup with the amount of sugar added.
• Stir the water until the sugar is dissolved.
• Start with the cup with the most sugar. Using a pipette, dropper or back of a spoon, begin adding the first layer of sugar water.
• After the first layer, things get challenging. Carefully drip the next dense layer onto the surface of the first. The best technique is to place the pipette right above the surface of the first layer and against the glass. Slowly drip the next color onto the first. This will take a lot of patience. Go slow.
• The colors will begin to mix at first and then your original color will start to show.
• Repeat with the next dense color and the least dense color until you have stacked all of the colors.

NB.: The more sugar you add to the water, the more sugar molecules will take over the space, making the water more dense. The cup containing the 5 tablespoons of sugar will be the most dense, the cup with 1 tablespoons will be least dense. That is why we layer them with the most dense liquid at the bottom and the least dense at the top.