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.
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
Funnel
Measuring spoons
Mixing container that is pourable
Tray to collect overflowing foam
Three Ghost Friends eBooks or paperbacks
Procedure:
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.. |
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. |
The foam started growing immediately! |
My kids yelled and screamed with excitement at this point! |
Very cool! |
The ghost looks like it is yelling, "OH NO!" |
Where did the ghost go? |
BOO! There it is! |
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