Rainbow in a Jar

Observe how different liquids layer due to their density by creating a colorful rainbow effect in a clear container.

What you need

• A tall clear glass or jar
• Honey
• Dish soap (colored)
• Water mixed with food coloring
• Vegetable oil
• A spoon

How it works

Each liquid has a different density. Heavier (denser) liquids like honey sink to the bottom, while lighter liquids like oil float on top. This helps children understand that heavier does not always mean solid.