Thursday, August 15, 2013

Oozy, Foamy, Overflowy Ghost

My kids discovered a recipe for Elephant Toothpaste on Steve Spangler Science website and wanted to do it right away. I thought it would be fun to turn this cool science experiment into a fun ghost activity that your kids will love this Halloween. We did this for the WOW factor, but if you are interested in the science behind the experiment make sure you check out his site.

This activity would be fun to do after reading any of my Three Ghost Friends eBooks  (also available in paperback!)
Supply List:

1 Clear large plastic container that is ghost-shaped. (I used a mayonnaise container.)

1 cup of hydrogen peroxide solution (many of the science websites call for a 20-volume hydrogen peroxide liquid that is a 6% solution and is available at beauty supply stores.  We just used the bottle we  had at home that was purchased at the pharmacy.)

2 teaspoons of dry active yeast

4 Tablespoons of warm water

Liquid Dish Soap (We used Dawn)

Food coloring (if you want a colored ghost -- Hey I know a good eBook for that!)

Small cup for mixing yeast and water (we used a yogurt container.)

Black Sharpie Marker

Safety goggles


Measuring spoons

Mixing container that is pourable

Tray to collect overflowing foam

Three Ghost Friends eBooks or paperbacks

Here are some of the supplies we used! Hopefully, you have them in your house and you won't have to go buy these items at the store.  But, if you don't, you will find that they are all relatively inexpensive.
First, I drew a ghost face on the mayonnaise container.
Then, we poured 1 cup of hydrogen peroxide into the container. If you want to add food coloring you would do that now. We chose not to because we wanted a white ghost.
I had my oldest son squirt a bunch of Dawn dish soap into the container. You need around 2 Tablespoons.
My youngest son mixed the 2 teaspoons of dry active yeast with the 4 Tablespoons of warm water. 
We used a fork to break up the bits of yeast, and help it dissolve into the warm water..
Meanwhile, my son swirled around the Dawn dish soap and hydrogen peroxide. (Notice, he is not wearing safety goggles. We forgot and should have had them on because hydrogen peroxide can irritate skin and eyes.)
Next, we moved outside and placed our ghost container in a tray to collect the overflowing foam.
The funnel helped get the yeast and water mixture directly into the container without spilling.
Halloween Ghost Activity for kids!
The foam started growing immediately! 
Halloween Ghost Activity for Kids
My kids yelled and screamed with excitement at this point!
Halloween Ghost Activity
Very cool!
halloween science activity
The ghost looks like it is yelling,  "OH NO!"

oozy foamy overflowy ghost activity
Where did the ghost go?
Oozy, Foamy, Overflowy Ghost
BOO! There it is! 
Please pin this picture to your Halloween activities board!
Follow Three Ghost Friends on Pinterest!


  1. You could get a similar effect with baking soda, vinegar, and dish soap (we've done that before). I'm excited to try your recipe and see how it compares!