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Science Activity – Baking Soda Volcano Experiment

I love this Science Activity! It’s a learning lesson and craft all rolled into one and Junior got super excited seeing the Volcano bursting out! We did this sometime back and with summer holidays just around the corner, I really think we must give it another go!


Keep reading to get details on this super exciting science experiment!!

What  Junior & I used:

  • Clay
  • Plate to hold the mess, but you could very well do with a baking tray or like
  • Baking Soda – NOT baking powder
  • Bottle of vinegar
  • Red or orange food colouring
  • Green acrylic or water paint

How we went about it:

  1. Ask you little one to use the clay and mold into the shape of a mountain with a cavity inside where the volcano can erupt from. Make sure there aren’t any holes around the mountain. You don’t have to be super perfect since, there can be eruptions from the sides as well! Once done, the mountain will have to be left to dry overnight.
  2. Once the mountain is dry, you can get your little one to colour the mountain. I wanted it done in green so that it looks like there is a nice foliage around the mountain, somehow Junior wanted it to be brown and why not!!! It’s his experiment!!! Keep the painted mountain to dry overnight.
  3. Once the mountain is dry, it the exciting science bit!! Place the mountain on a plate or baking try.
  4. Place a round 2 to 3 teaspoons of baking soda in the cavity of the mountain.
  5. Mix 2 to 3 drops of orange food colouring with the vinegar. You can use more to get the desired colour of lava.
  6. Pour the vinegar into the cavity and voila!!! The lava bubbles out!!!

Explain what happens:

So an explanation as to why the ‘lava’ bubbles out is important. Explain that there is a reaction between the baking soda and the vinegar which causes the water to break away and a gas called carbon monoxide to separate. This reaction makes it fizz and bubble and that’s why the eruption takes place!!

Totally cool experiment and I guarantee to you, that you’re little one will want it done over and over again!!!

The photo I’ve uploaded does not do justice to how much of fun this experiment is, it’s a bit difficult to handle the camera and do the stuff together! But trust me this is fun and do not miss out on it!


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