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Step 1: Materials
All that you need for this project is a water balloon, a straw, and tape
Step 2: Attach Balloon
Attach water balloon to one end of the straw by putting the straw through the open end of the balloon
Step 3: Tape It
To make sure the balloon stays attached the the straw put tape on the straw and balloon like in the picture
Step 4: Launch
There are 2 ways to launch you can stand the straw on a flat surface and pull down on the balloon as shown in pic 1. The second is holding the balloon and pulling the straw back as shown in pic 2