first get a pen that you can take apart in tree peices. now get a party popper apart. take the part that actuly explodes and put the string trough the hole that the tip of the ink thingy goes trough when you click the top of the pen. now take off the top of the pen where the clicker thingy is. now from the top of the pen shove a bb in. make sore that your not squisind the tinng that that explodes. pull the string it should explode and shoot the bb out.


how it works .

when you pull the string rapidly the thingy explodes producing pressure in the pen tip the jammed bb shoot sout but this happens in less than a second.