Activity Time: Fizzy, Foamy Fun

Today we are going to play with baking soda and vinegar to make some fizzy, foamy fun! When baking soda and vinegar are mixed, there is a chemical reaction that causes carbon dioxide (and water) to be made. The carbon dioxide gas is what makes the bubbles.

Supplies needed: 

  • Baking Soda
  • Vinegar
  • Dish Soap 
  • Food Coloring
  • A Small Dropper
  • A Rimmed Plate or Shallow Bowl
  • Small Bowl or Cup for Mixing

In a small bowl or cup, mix together:

  • A tablespoon of baking soda
  • A small squirt of dish soap
  • Several drops of food color

You may need to add a tiny amount of water to get it to stick together.  You want the consistency of wet sand. It should hold together loosely if you squeeze it, but break apart easily.  If you add too much water, it will affect the chemical reaction.  You can always add more baking soda if needed.

Once you have done this will as many balls of color as you want, place them in a plate or shallow bowl.  

Put the vinegar in a small bowl or cup and use a dropper to add vinegar slowly to the baking soda balls.  

Watch as the vinegar reacts with the baking soda and causes all the fun foam.  Can you hear it fizz?

To see if I could get the colors to mix, I pushed all my baking soda balls together in the center of my dish and poured the rest of the cup of vinegar in the center.  The reaction will continue to happen if you add more vinegar to the baking soda balls, but the bubbles may be smaller or slower to form. 

Another way you can do this activity is to spread out the baking soda in a rimmed dish or bowl.

Add the food coloring in drops on the baking soda.

Using the dropper, add the vinegar to the color spots.   If you have a little one, this is a good fine motor skills activity as well as learning about colors and color mixing.

I hope you have fun with this kitchen chemistry activity!

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