This is a toy that the air will come out from the hole when you strike it.
Japanese page : How to make an air gun with a cardboard box
How to make the air gun
Put the gummed tapes tight to the cardboard box, so that the air doesn’t leak out.
Make a hole.
Draw a 10 centimeters in diameter circle to one side of the box.
Cut out the hole with a cutter.
Strike the both sides of the box, then the air will come out vigorously.
Know-how and the points
Be careful, not to cut yourself using the cutter.
Use cotton gloves when you use the cutter.
Things we use
Cardboard box, gummed tapes, a magic pen, a cutter, cotton gloves