Chemical Popgun
There is a big mess on the ceiling in Room 1.
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We put vinegar and baking soda in a small plastic bottle and quickly put a cork in the top of the bottle. There was a chemical reaction and and the resulting carbon dioxide gas blew the cork and fizzy, bubbly mixture up very high onto our ceiling. It dripped down and made a mess on the white ceiling.
The mixture exploded! It was lots of fun.
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