Activities / Experiment
Fizzing kitchen volcano
Baking soda and vinegar turn into a foamy eruption you can repeat again and again.
- Ages3+
- Time15 minutes
- A grown-up helps withPouring vinegar
How to make it
- Stand the cup in the middle of the tray.
- Put the baking soda in the cup. Add the dish soap and a few drops of food coloring.
- Pour in the vinegar and step back.
- When the fizzing stops, add another spoon of baking soda and pour again.
Why it works
Baking soda and vinegar react and make a gas called carbon dioxide. The gas needs room, so it pushes up and out as bubbles. The soap traps the gas and makes the foam thicker.
Try next
- Build a mountain around the cup with play dough or damp sand.
- Does warm vinegar fizz faster than cold?
Safety note. Vinegar stings in eyes. Keep faces back from the cup and rinse with water if it splashes. A grown-up should be nearby for the whole activity.
Watch it
The video for this activity is on its way. It will be on our YouTube channel first.
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