Bamboo gun

Bamboo gun is a traditional toy gun made from a hollow cylindrical piece of bamboo and a piston works as a syringe plunger. A tough small "bullet" like a dry seed or a wet piece of paper is inserted in one end of the cylinder and the piston is pushed in rapidly at the other end. This results in the air compressing inside before it pushes the "bullet" out with a pop.

Today, the material of the gun barrel is modified from bamboo to alloy.

Philippines
Luthang, is a Filipino bamboo gun that is popular among children in rural areas of the Philippines.

The name luthang is originally Cebuano, meaning a small naval cannon (lantaka). The word has been recorded in Spanish dictionaries of Visayan languages since at least 1711, where its meaning evolved to include muskets, arquebuses and shotguns. The word is still used as a verb meaning "to gun down" in Cebuano languages; and in Hiligaynon as an archaic synonym of pistola (gun or pistol).

Vietnam
The bamboo gun was a wildly popular toy in Vietnam in the 90s-2000s and had many names, such as súng phóc, ống phóc, ống thụt,etc.