Fireworks In A Jar

This is a super fun science experiment that’s perfect for Independence Day!

Create your own mini fireworks display with your child using water, oil and food coloring. Watch your child be amazed by their own fireworks. Teach them about liquid density in the process!


This is such a cool experiment! Oil and water don’t mix. Water molecules attract each other, not oil molecules. Their molecules are different densities. They don’t want to hang out with each other. Instead they create separate layers of liquids.

When you place liquid food coloring in between these separate layers, you create a “firework” effect! This is one experiment your child will want to do again and again.

Let’s begin! You’ll need:

  • A clean, clear jar
  • food coloring (liquid works better than gel)
  • 3T cooking oil
  • a spoon

Fill the jar 3/4 of the way with water.

Measure out 3 tablespoons of cooking oil. Lighter oil, like canola, is best to see the color drops. I used extra virgin olive oil because that’s what I had in my pantry.

Have your child choose 3-4 different colors of food coloring. Liquid food coloring works best for this experiment. I used gel coloring though and my toddler still loved it.

Drop 3-5 drops of each color into the oil cup and stir violently with a spoon. You want to form tiny tiny droplets in the oil without muddying the colors.

Immediately pour the oil and coloring into the jar of water. The droplets of food coloring will be trapped in the oil at first. Wait for it. Kazaam! The molecules in the water-based food coloring are repelled by the oil molecules. They are pushed through the oil and fall into the water. They mix with the water and “explode” into different bursts of color!


What colors did your children choose? Let me know in the comments section below.

To watch a video demonstration of my washable shaving cream paint check out my YouTube Channel, Bianca’s Family.

You can get articles like this regularly, along with craft recipes, snack recipes and preschool lessons by subscribing to my blog. Check out our facebook page and Youtube channel as well!

Thanks for reading!

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