Create a rainbow in a glass using Skittles, water, and density! --WHAT YOU'LL NEED-- Water A mug 5 separate cups A Tablespoon A clear glass A dropper or pipette --STEP 1-- Separate the Skittles into the cups, in these amounts: 2 red, 4 orange, 6 yellow, 8 green, and 10 purple. --STEP 2-- Heat a mug of water in the microwave for a minute and a half (or long enough that the water is hot, but not boiling). Be careful removing the water from the microwave–it’s hot! --STEP 3-- Measure and pour two tablespoons of hot water into each cup, on top of the Skittles. --STEP 4-- Stir each cup carefully so no water splashes out. The cups need to be cool for the next part of the experiment, so leave them somewhere where they won’t get knocked over. Stir them every ten minutes or so until the Skittles are dissolved and the water is room temperature. --STEP 5-- Using the dropper, add the colored water from the five cups to the clear glass. Start with purple, then add green, then yellow, orange, and red last. Go slowly here, we don’t want the different layers to mix. --STEP 6-- Congratulations, you made a rainbow. You didn’t even have to go outside! --------- Image credit: www.sciencefun.org