knex fire ball shooter!!!(no joke!!!)
i know it sounds dubm bacause the fire would melt knex peaces but i had a idea. you make knex track for a lighter to travel on and at the end have a peace that set off the lighter but still let it travle out of the gun. you put a layer of paper at the ent of the gun and the lighter lights the paper and when the lighter leaves the gun it takes the paper with it make ing a fire ball!