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.

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

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

Take the pipe and connect it to the valve

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

It's ready