Add around 5 tablespoons of white vinegar to a plastic bottle.
Get the bicarbonate of soda ready .
Add the bicarbonate of soda with a clean spoon to the ballon , add around 8 tablespoonsful
Adding bicarbonate of soda into the balloon .
Making sure the balloon is filled.
Once filled, secure the balloon to the top of a small plastic bottle that has the white vinegar in.
Secure the balloon around the neck of the bottle.