What You Need

• Water
• Oil
• Food coloring
• Tall clear glass
• Another cup or glass
• Fork

Instructions

1. Fill the tall glass almost to the top with room-temperature water. Warm water is ok, too.
2. Pour a little oil into the other glass (1 to 2 tablespoons).
3. Add a couple of drops of food coloring.
4. Briefly stir the oil and food coloring mixed with a fork. You want to break up the food coloring drops into smaller drops, but do not thoroughly mix the liquid.
5. Pour the oil and coloring mixture into the tall glass.
6. Now watch! The food coloring will slowly sink in the glass, with each droplet expanding outward as it falls, resembling fireworks falling into the water.

Cites

https://www.sciencefun.org/kidszone/experiments/water-fireworks/

https://www.thoughtco.com/make-under-water-fireworks-603370