The Coconut Volcano Science Experiment

 This is a continuation of the Wash & Learn series by In Lieu of Preschool and Bath Activities for Kids.  You can read part one of our Dinosaur & Volcano Small World Play here.

 After the kids had painted and pieced together a volcanic eruption and played with their dinosaurs a bit, I set up part two of our science play: the Coconut Volcano Science Experiment!  This is actually our second time making a coconut volcano and I believe if I had enough baking soda and vinegar, my kids would do this activity over and over forever!  I don’t blame them!!

coconut volcano science experiment

To get ready for our experiment, I added one of our breakfast trays to the tub.  Both kids still have plenty of room with the tray in place and it provides a nice surface for them to work without knocking stuff off the side of the tub onto the bathroom floor.

Next I put some baking soda into a plastic yogurt cup.  We save these and applesauce cups and use them for everything!!

coconut volcano science experiment

Then the kids placed our empty coconut shell on top of the yogurt cup.  We used the half of the shell that has 3 holes in it from where the eyes were punched out to drain the coconut water.  You can see more activities we’ve done with our coconut here.

coconut volcano science experiment

In a cup, I mixed together our lava!

coconut volcano science experiment

To make the lava, I simply mixed together vinegar, red food coloring, and a squirt of dish soap.  Then the kids used a baby nasal aspirator to suck up the liquid from the cup,

coconut volcano science experiment

and squirt it through one of the holes on the top of the coconut.

coconut volcano science experiment

In a few seconds, bubbly red lava would come out of the volcano and ooze it’s way down the sides!!

coconut volcano science experiment

Once the bubbles would stop, we’d simply rinse the coconut and yogurt cup out in the water, add some more baking soda, put it all back together, and make another volcanic eruption.  The kids took turns rinsing the cups and squirting the vinegar.  Using their hands to squeeze the aspirator is great fine motor practice which helps with future writing!!  

coconut volcano science experiment

coconut volcano science experiment

coconut volcano science experiment

We only used about a cup of baking soda and a cup of vinegar but we were able to make the volcano erupt many, many times!!The lava eventually turns the kids’ bath water red as it spills off the tray.  Yet another fun aspect of this bath!!

coconut volcano science experiment

The kids had fun touching the bubbles as they came out of the volcano…

coconut volcano science experiment

and playing with their dinosaurs who were trying to get out of the path of the hot lava coming their way!

coconut volcano science experiment

This really is one of the most fun science play activities we’ve done so far!!

coconut volcano science experiment

       Now be sure to hop over to Bath Activities for Kids to read all about Mud Science for Kids!

And also stop by In Lieu of Preschool to read part one of this post: Dinosaur & Volcano Small World Play in the Bath!!


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  • I love that you did this in a coconut. That is so creative!

  • Love that you did it in the bathtub 🙂 We always do ours outside. And I love the coconut/dinosaur theme – fun!

  • Stephanie says:

    Great idea! I want to try in my preschool classroom. Also, I shared on our district’s Birth to Five Facebook page for getting kids ready for kindergarten. Thanks for posting!

    http://www.facebook.com/U46GiveMeFive

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  • Natasha says:

    Wow I LOVE this! My two would love it, can’t wait to try it

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  • Gowtham says:

    simple and easy method…. I like it very much…. 🙂

  • Lyssa says:

    Love it! Did this in my science project, and got A+! awesome experiment. Cute,