That's my 65 year old childhood toy in my village. same construction. mine is simpler. functions as a catapult or bow. On the body there is a place to put catapult seeds. without picking up, just slide the valve at the top - with the upper back of the valve as a runway - a seed trench and as a darts runway. slightly lift the front body. The seed rises from its place and slides backwards into the throwing net, catch and aim and then release. Likewise if you want to shoot archery. Put it on the runway along the body, put pinch, aim and release. Material completely from bamboo. use a knife to cut, slash and grind just like making a kite. if you are a boy this is an idea for a great toy. if you are a father, you absolutely do not want your son to come up with something like this, because it will mean very big trouble.