Elephant toothpaste

February is National Children’s Dental month and we’ve been having all kinds of fun learning how animals have different types of teeth!  To extend our study into science, we created elephant toothpaste…

Elephant toothpaste by Teach Preschool

We began our study of animal teeth by reading our Scholastic Weekly Reader.  The front cover of the Weekly Reader gave us a close up view of four different types of animal teeth.  The children had fun trying to identify what type of animal each set of teeth came from.  When we opened our Weekly Readers, we discovered the source of each set of animal teeth.  The children were particularly interested in the elephant tusks.  We talked about how big an elephant’s toothbrush might be and how much toothpaste you might need for that big of a toothbrush.  Following our discussion of animal teeth, I asked the children if they were interested in making “elephant toothpaste.”  The responses ranged from, “Elephant toothpaste?!” to “Eww, gross!  What’s that?”  Boy, were they in for a surprise…

Elephant toothpaste by Teach Preschool

Doing experiments with preschool aged children can be challenging.  However, I’ve learned a few things that can make the process easier and less stressful.  First, doing experiments with children in a small group is much easier than with a large group.  If  you find yourself avoiding experiments due to class size, you may think about dividing your class into smaller groups.  Secondly, preparation is key.  Do your research so that you can be prepared for the unexpected.  Have as many of the components of the experiment prepared ahead of time to make the process as simple as possible for the children.  Lastly, be sure to take your time walking the children through the process step by step.  Elephant toothpaste is a relatively quick experiment, but by taking our time with each step, the children can better understand and enjoy the experiment….

Elephant toothpaste by Teach Preschool

Prior to introducing elephant toothpaste to our students, I did some research on my own.  I wanted to be absolutely sure that this experiment could be recreated by preschoolers.  First, I watched a an elephant toothpaste video by Science Bob.  Then I attempted the experiment on my own at home.  The one thing that I discovered on my own is that a less concentrated form of hydrogen peroxide produces a grand result and more safe for children to explore on their own.

If you would like to try to make your own elephant toothpaste, you will need these items for each child:

  • 16 oz. plastic water bottle
  • 1 tablespoon or one envelope yeast
  • 3 tablespoons warm water
  • 1 tablespoon liquid dish soap
  • 1/2 cup hydrogen peroxide (we used 3% for safety purposes)
  • cup
  • spoon
  • goggles
  • tray or pan for overflow

Elephant toothpaste by Teach Preschool

You can prepare a few of the components ahead of time….

  • Pour a 1/2 cup of 3% hydrogen peroxide into each of your plastic water bottles and set aside.  
  • Fill small cups with 3 tablespoons warm water.  
  • Also, pour 1 tablespoon of liquid dish soap into individual cups.  

Prepare your table for the experiment by setting out materials for each child.  Each of our students got goggles, a tub for overflow, a packet of yeast, scissors, a spoon, and 1 tablespoon liquid dishwashing soap.  When the children were seated with their goggles on,  I gave them each one of the small cups that I had filled with warm water.  I then asked them to cut open their packets of yeast and pour the yeast into their warm water…

Elephant toothpaste by Teach Preschool

The children then stirred the yeast with their spoon for about 30 seconds…

Elephant toothpaste by Teach Preschool

Once the yeast and water were mixed well, I asked the children to set their cups aside.  Next, I distributed the plastic water bottles that we had previously filled with the 3% hydrogen peroxide.  The children placed their bottles in the middle of their tubs.  We then poured the 1 tablespoon of liquid dishsoap into our bottle of peroxide…

Elephant toothpaste by Teach Preschool

The children swirled the dish soap and peroxide gently to mix the two ingredients together.  Finally, we were ready to add the warm water and yeast mixture to our plastic bottles…

Elephant toothpaste by Teach Preschool

The mixture began to grow before our eyes!  The yeast and water were reacting with the soapy peroxide, creating a fast growing foam.  The children were soon surprised when their bottles were overflowing with elephant toothpaste…

Elephant toothpaste by Teach Preschool

Once our bottles overflowed and the experiment was over, we allowed the children to play in their newly created elephant toothpaste.  We were comfortable letting them explore the mixture with their hands because we used the 3% hydrogen peroxide, which is a less concentrated formula than what many recipes call for but we still stayed around to monitor the play.  The children loved feeling the foamy “toothpaste.”  Many tried to scoop it up and pour it back in their bottles.  When they squeezed their bottles, it would come pouring out again…

Elephant toothpaste by Teach Preschool

The children loved creating elephant toothpaste.  This was a super fun experiment that was made successful with just a little bit of research and planning.  I encourage you to give science experiments a try either at home or in your classroom.  Your children will love getting their hands messy and it will be an experience they won’t soon forget…

Elephant toothpaste by Teach Preschool

Available on Amazon

Links to grow on:

Toothbrush water play in preschool by Teach Preschool

Tot school: dental health by The Preschool Experiment

Our pearly whites by Preschool Playbook

By |2013-02-28T06:00:37+00:00February 28th, 2013|

About the Author:

Deborah J. Stewart, M.Ed. has been working and teaching in the field of early childhood education for over 30 years. Deborah currently owns and teaches in her own part-time, private preschool called The Children’s Studio. Deborah’s deep passion for teaching and working with young children is documented and then graciously shared with millions of readers around the world through her blog and other social networking communities. Deborah believes that young children learn best through play and exploration and embraces this belief in all that she does in her own classroom so that she can effectively and passionately share rewarding, real- life, tried-and-true practices with other teachers, parents, and leaders across the field of early childhood education.


  1. Lorie February 28, 2013 at 11:09 am - Reply

    I haven’t tried this with my preschoolers because I was nervous about the stronger hydrogen peroxide, so it’s nice to know that it will work with the weaker stuff. Thank you!

  2. Lori February 28, 2013 at 3:43 pm - Reply

    Can you tell me where you purchased those trays? I would love to do this in class, but I don’t have anything to catch the overflow. Thanks

    • Courtney Floyd February 28, 2013 at 8:27 pm - Reply

      Lori, we have a couple different sets of these tubs. One set was purchased from Target in their Dollar Spot for $2.50 or $3 each. You can also purchase them from United Art and Education or Discount School Supply. When I did this experiment at home, I just used a 9 x 13 pan.

  3. Raleigh Preschool February 28, 2013 at 3:47 pm - Reply

    I too was iffy about the hydrogen peroxide. Am glad to see a less concentrated solution will work just the same. Looks like your kids had a blast, will have to try this next February for Dental Health Month. Or incorporate it into another lesson. Thanks 🙂

  4. Amy March 1, 2013 at 12:07 am - Reply

    LOVE this, we are going to put it on our “to do” list to try next week! Thanks for the inspiration! I’ve added you to the Friday 5 this week!

  5. Veens March 1, 2013 at 12:07 am - Reply

    Love this idea. So cool, I really want to try this on my own 😉

    I want to tell you, that I follow your blog religiously 🙂 Thank you for some of the best ideas I have seen in a while. You rock 🙂 and I think your school kids are so lucky to have you 🙂

  6. Jessica @ Play Trains! March 2, 2013 at 4:29 am - Reply

    I’ve been wanting to do this, but haven’t wanted to buy a bottle of the concentrate hydrogen peroxide. Thanks for showing it can work without it! My son will love this.

  7. Chris March 8, 2013 at 6:21 pm - Reply

    This is such a fun experiment! The foamy mess is amazing to preschoolers (and to me!), as is the fact that this reaction is exothermic reaction — heat energy is one of the products. The children can wrap their hands around the bottle and feel the heat. Fun!

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