Air Preasure Gun

This is an air pressure gun which I made from some junk which was kept in my house and was useless . it would approximately cost about 100 rupees or 1.68 us dollar. It is very simple to make.

Step 1: Materials

First collect these materials
A bottle
A pin
A water valve
Pipe

Step 2: Putting the Pin in the Bottle

Make a hole in the bottle and put the pin it and then use a hot glue gun to fix it

Step 3:

Take the pipe and connect it to the valve

Step 4:

The last step is to connect the bottle to the other end of the valve

Step 5:

It's ready