Super Star Scientist
Ryan!
Experiment:  Fantastic Foamy Fountain
Objective:  How to create an exothermic reaction
First, Ryan and his assistant, Mom, carefully measured out hydrogen peroxide...
…and poured it into the plastic soda bottle. 
Next, he added a tablespoon of dish soap to the bottle.
Then Ryan added 8 drops of blue food coloring to the mixture.
After that, Ryan shook the bottle to thoroughly mix the three ingredients in the bottle.
Now the fun part!  
Ryan added a yeast mixture, the catalyst or "helper", 
to the mixture in the bottle...
…and we watched the blue foam erupt...
…and erupt…
…and erupt some more!! 
What a fun experiment, Ryan!
Ryan told us the experiment is nicknamed
"Elephant Toothpaste"!!
Conclusion:  The yeast helps to create the reaction to remove oxygen from the hydrogen peroxide to create foam and heat.
Super job, Scientist Ryan!