this is a simple confetti cannon which you can easily rebuild. You jus need the print file and a baloon. Then you have to put it together in three steps. First you put the baloon on the top oft the big part. After this you gonna put the little part on the top oft the big part and the baloon. Now your confetti cannon ist finished. (the baloon has to be prepared. ( First you tie a knot an then you cut the ballon off at the top)).