Materials:
1 balloon
Glass bottle
10ml Baking Soda
Funnel
40ml Vinegar
 
1. Pour the vinegar in the bottom of the glass bottle.
2. Using funnel, put the baking soda into the bottom of the balloon.
3. Stretch the mouth of the balloon over the mouth of the bottle.
4. When you are ready, lift the bottom of the balloon with the baking soda and allow it to spill into the vinegar.  Do this quickly.
Extensions: measure the circumference of the balloon with a measuring tape and record.  Do the experiment again using different amounts of materials to see if you get a different resu