Balloon gun

While it may look weak, this little gun can even shoot a hole into a solid board if you pull it back far enough. And also it can basically shoot anything that fits in the barrel and also BB bullets. Oh and the only thing it needs is a ballon and a ziptie. You just have to cut the ballon in half and place the bigger end of the ballon over the edge where the side with the bead and then put a ziptie over it. It shoots Ludi (flower and water), flower, water, BB's, fire etc.