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make this musical bag pipe or a bean using a film can, an old sketch pen and a stretched
balloon. take an old sketch pen, remove its tip, the back end and remove the cartridge.
so it will be just an empty tube. with the help of scissors, make two small holes. take
a film can and with scissors make a hole in the base. the hole should be large enough
to best fit the pen. now take the sketch pen and push it very tightly in the film can.
there should be no leakage between the sketch pen and the can. now make a small hole and
fit a ball pen refill. it should be also tight fit. then take a cut balloon .... and stretch
it on the mouth of the film can and secure it in place with a rubber band. now your musical
instrument is also ready. you need to push the pen so that it just touches the stressed
balloon or the membrane. now blow through the refill yo hear lovely music.