OK, I’m using the term volcano pretty loosely here, but we did make a bubbly red reaction of baking soda and vinegar that was really fun!
I set out a bowl with vinegar and another bowl with baking soda. They explored how the baking soda felt and how the vinegar smelled. Then we talked about the differences between the two materials – liquid vs. solid, dry vs. wet, etc.
After talking about what a volcano is and looking at pictures of real ones, we added red food coloring to our vinegar to make it look more like lava.
Then they added the vinegar lava to our baking soda mountain and caused some nice bubbling, which is always fun for the boys to watch.
This was another idea that came from our Preschool Science book, but we definitely adapted it from the original idea.