Science experiment - magic balloon

Here's a quick and fun experiment I recently did with my son. 

Pour 4 Tbs vinegar in a bottle

Put 2 Tbs baking soda in balloon (easiest to use a funnel). 

Put balloon over top of bottle and shake soda into vinegar. Watch it foam as gas is released and fills up the balloon. 

I used a glass bottle (I only had a beer bottle in my recycling bin), but a plastic water bottle works too. 

We talked about gases and chemical reactions. Of course, as kids get older you can get more in depth on "why."  My 3 year old was impressed with the visual and was quick enough that he was not bored. 

I love science!