Make a glass with 6 layers of colored liquid — all stacked perfectly on top of each other. It looks impossible but the secret is sugar and density!
What You’ll Need
🍯 6 small cups
🥃 1 tall clear glass
🥄 A measuring spoon
💧 Water
🍚 Sugar
🎨 Food coloring (6 colors)
💉 An eye dropper or syringe (or you can pour slowly over a spoon)
How to Do It
1. Fill each cup with 1/2 cup of water.
2. Add the following amounts of sugar to each cup:
🔴 Red: 1 tablespoon sugar
🟠 Orange: 2 tablespoons
🟡 Yellow: 3 tablespoons
🟢 Green: 4 tablespoons
🔵 Blue: 5 tablespoons
🟣 Purple: 6 tablespoons
3. Add a few drops of matching food coloring to each cup.
4. Stir each cup until the sugar dissolves completely.
5. In the tall glass, start with the PURPLE (most sugar) at the bottom.
6. Using the eye dropper (or pouring very slowly over the back of a spoon), gently add ORANGE on top.
7. Then YELLOW. Then GREEN. Then BLUE. Then PURPLE.
8. Done! You have a rainbow in a glass! 🌈
Wait — the order should be the opposite. The most sugar (purple) goes FIRST (bottom). The least sugar (red) goes LAST (top). Let me re-do that order:
Correct Layer Order (bottom to top):
1. Purple (6 tbsp sugar) — bottom
2. Blue (5 tbsp)
3. Green (4 tbsp)
4. Yellow (3 tbsp)
5. Orange (2 tbsp)
6. Red (1 tbsp) — top
How Does It Work?
Sugar makes water heavier (denser). The more sugar you dissolve, the heavier the water becomes.
Heavier liquids sink. Lighter liquids float on top — IF you add them gently. This is the same principle as oil floating on water!
If you pour too fast, the layers will mix. The trick is patience and a steady hand.
Real-World Examples
🌊 The ocean has layers like this — warm fresh water sits on top of cold salty water below
🍯 Honey vs water — honey is denser
🛢️ Oil + vinegar dressings naturally separate
Density: invisible but important! 🔬
