While I was away, Sarabeth led a really fun and interactive activity that used balloons to demonstrate chemical reactions. This is an activity we have done before at girls science club, and the girls love it every time! The idea is that when we combine baking soda (a base) and vinegar (an acid), they react chemically and create a gas, which will blow up the balloon.
The girls first filled their balloons with baking soda and put a bit of vinegar in a water bottle. They then pulled the balloon around the top of the water bottle.
When the balloon was secure on the top of the water bottle they tipped the baking soda in.
The looks of surprise and awe on their faces when the balloon is blowing up is just so awesome!