To become a ninja master, one needs discipline, a silent footstep, and an impressive personal arsenal. Author and toy designer John Austin shows even "little grasshoppers" how to turn disposable pens, rubber bands, old CDs, toothpicks, erasers, mint tins, and binder clips into miniaturized stealth weaponry. Clothespins, craft sticks, playing cards, pushpins, and recycled milk jug caps make a cotton swab-launching Hwacha Rocket Cart. Rolled magazines, book rings, and duct tape can be fashioned into a set of working but harmless nunchucks. And a carefully folded sheet of paper can become an origami boomerang. This handy resource provides detailed, step-by-step instructions with diagrams to show stealth warriors how to build 37 different ninja weapons for the modern era. All of the projects in MiniWeapons of Mass Destruction 4 are built from common household and office items-plastic utensils, markers, clothespins, paper clips, wire hangers, and discarded packaging-all clearly detailed on materials lists. Builders are offered a variety of samurai stars, blowguns, throwing darts, siege weapons, and ninja tools to choose from. Once they've assembled their armory, the author provides novices several targets to practice their shooting skills. Nested paper cups become a dragon; chopsticks and a paper plate, a tripod bulls-eye. Armed, trained, and shrouded in black, they are now prepared for missions of reconnaissance, sabotage, and other grim errands. John Austin is a professional toy designer and author of MiniWeapons of Mass Destruction series, as well as So Now You're a Zombie. He lives in Cincinnati, Ohio.