Mini Rainbow Volcanoes

My daughter wanted to make rainbow volcanoes.  Here is a look at what we came up with.

 

We put a layer of baking soda in the bottom of a cake pan and then we added drops of food coloring.  I filled up a spray bottle with vinegar and let her start spraying away.  She started off spraying the drops of food coloring and watching the fizzy reactions.  She loved these mini colorful volcanoes and then she decided to mix up all the colors.

 

The spray bottle was not spraying out enough vinegar for her to get a large reaction so we took the lid of and just used the bottle for pouring.  She loved getting a handful of baking soda and then having me pour vinegar onto it.

It was fun to see the volcano erupt in her hands.  She thought it tickled.

 

After a while she asked if she could use another bottle.  I gave her one and she started filling it up with the baking soda that was left.  Then she asked if it would make a volcano now.

I was not sure how good of reaction she would get since the baking soda seemed pretty saturated at that point but we tried it.  It worked really well still.  She refilled up the bottle a couple more times before the reaction finally started to dwindle.

 

She informed me that making volcanoes is her favorite type of science experiment.  You can check out some of our other volcanoes and attempts here and here and here.