Picture of Simple Water Bottle Rockets
I love making waterbottle rockets but can't be bothered putting in the work to make one with fins and remote releases and all that rubbish,so I have made a rocket that is just as fun but is so simple that my friends 5 year old brother made one.
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Step 1: Stuff you need

Picture of Stuff you need
to keep it simple I only use 3 things :

5 if you count water and air

Step 2: Drill the hole in the cap

Picture of drill the hole in the cap
with the drill

Step 3: Just add water

Picture of Just add water
fill the bottle about half full.

Step 4: Launch

Picture of Launch
slide the compresor into the bottle when it is on.
pause for about 10 seconds.slide the bottle off the compressor and get out the way.
if there is a leak get a new cap and start again.
you will get a little wet
warning:dont point at people.