Go Back

Safe Fireworks Float or Sink Experiment

A fun and educational science experiment for kids that demonstrates concepts of density and buoyancy with colorful 'fireworks'.
Print Recipe Pin Recipe
Prep Time 15 minutes
Total Time 15 minutes
Servings: 4 servings
Course: Educational Activity, Science Experiment
Ingredients Method Notes

Ingredients
  

Supplies Needed
  • 4 cups Clear cups or glasses
  • 2 cups Water
  • 1 set Food coloring (various colors) Gel food coloring can be used for richer colors.
  • 1/2 cup Oil (vegetable or canola)
  • 1 tablespoon Baking soda
  • 1 cup Vinegar
  • 1 piece A dropper or small spoon For careful pouring.

Method
 

Setup
  1. Fill each cup or glass about halfway with water.
  2. Use the dropper or spoon to add a few drops of food coloring to each glass, using different colors for a vibrant display.
  3. Gently pour a layer of oil on top of the colored water, creating a separation to highlight differences in density.
Create the Fireworks
  1. In a small bowl, mix baking soda with vinegar.
  2. Carefully pour the mixture into the colored water and watch the fizzing action that mimics fireworks bursting.
Observation
  1. Encourage the kids to observe the colors and bubbles, noting how long colors stay suspended in the oil.

Notes

Consider hosting a 'Science Fair Day' to showcase creations. Pair with themed snacks for a full day of learning. Store any leftover colored water in the refrigerator for a day or two, but enjoy fresh for best results.