Do you need to exact revenge on an unsuspecting co-worker or cheating classmate? Try a DuneCraft Spit Ball. DuneCraft Spit Balls are amazing wonders of chemistry that are slimy and gross to the touch. DuneCraft's reusable Spit Balls can bounce and then explode on target. They grow 200x their size, slip, slide, and explode! You will have hours of fun mastering the simple art of Spit Ball launching. Spit Balls are safe and non-toxic.