Make A Density Tower
Because liquids have all different densities, you could make your very own density tower with water, vegetable oil, and alcohol. Grab a clear glass bottle and pour three different liquids inside. You can use oil, water, and whiskey. Watch the magic happen! The liquids will all settle based on their different densities, making a colorful tower. This is all thanks to the different mass of molecules, and the denser ones sink to the bottom (Exploratorium).