this a really fun and also easy sience experiment
you will need:
-rubber stop with valve in it
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Step 1: Step 1
fill up the bottle around half full with water and put the rubber stop in it tightly so it can hold lots of pressure
Step 2: Step 2
now connect up the pump and start pumping until it blows off and shoots high in the air i will make a instructable soon on how to make a stand
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