The term 'KID'S WEAPON' can be defined by four crossword solutions: SLINGSHOT (9 letters), Peashooter (10 letters), BB Gun (5 letters), and POPGUN (6 letters). A SLINGSHOT is a handheld device used to launch projectiles, usually made of a Y-shaped frame with a pocket in the middle. A peashooter is a toy gun that shoots small pellets or peas. A BB gun is a type of air gun designed to shoot spherical projectiles similar to birdshot. Lastly, a POPGUN is a toy gun that makes a popping sound when the trigger is pulled. All of these weapons are typically used by children for recreational purposes.