Homemade Air-gun...!

Homemade Air-gun

First of all the materials we require are a 15 cm long metal or glass tube, potato and pencil.

Cut 4-5 mm wafer-thin potato slices. 

Now take the metal tube an press hard its one end against potato slice. This end will get closed. 

Now similarly press the second end and close it also. With the pencil, force the potato piece of one side a little further down in the tube. Now point it towards the
target. 

Use your pencil as the trigger and push it in the tube. The wafer on the other side will act as a shot and hit the target with a 'pop' sound !

So, how about making a harmless and inexpensive airgun? An airgun- in real sense.