Fireworks in a Jar: A Colorful DIY Science Craft for Kids

Fireworks in a Jar: A Colorful DIY Science Craft for Kids

Looking for a fun and educational science experiment that dazzles the eyes and sparks curiosity? Fireworks in a Jar is a vibrant DIY craft that combines basic kitchen ingredients with simple science principles to create a mini-explosion of color — all inside a glass jar! This safe, hands-on activity is perfect for kids and parents to enjoy together, introducing concepts like density and solubility in a memorable way.

🌈 What Is “Fireworks in a Jar”?

“Fireworks in a Jar” is a science craft where colorful droplets seem to explode and swirl inside a jar of water, mimicking real fireworks. This mesmerizing visual effect is caused by the interaction between oil, water, and food coloring — making it not only beautiful but educational, too.

🔬 Science Behind the Craft

This experiment works due to two main scientific principles:

Density: Oil is less dense than water, so it floats on top. Food coloring, however, is denser and sinks through the oil.
Solubility: Food coloring doesn’t dissolve in oil but does dissolve in water. As the droplets fall through the oil and hit the water, they suddenly burst and spread, creating a fireworks effect.

🧪 Materials You’ll Need

A clear glass jar (pint-size works well)
Warm water
Vegetable oil (or any clear cooking oil)
Food coloring (various colors for the best effect)
A small bowl or cup
A fork
Dropper or spoon (optional)

🛠 Step-by-Step Instructions

Step 1: Fill the Jar with Water

Start by filling your glass jar about three-quarters full with warm water. The warm temperature helps the food coloring disperse more quickly when it hits the water.

Step 2: Mix Oil and Food Coloring

In a separate small bowl or cup, pour about 3–4 tablespoons of vegetable oil. Then add several drops of different food coloring into the oil — around 3–5 drops per color. Don’t stir yet!