Abstract: A simulated hand grenade has a lightweight frangible outer shell of STYROFOAM (trademark), a small charge within the shell, fuse means for delayed detonation of the charge, and ignition means for activating the fuse means. In the preferred embodiment, there is a dye such as tempera powder within the shell. The fuse means is a lacquered igniter wire, commonly sold to hobbyists as "cannon fusing", which burns to provide a delayed detonation of in the range of two to ten seconds after ignition. The ignition means has a spring-loaded hammer arranged to impact a cap when released, to thereby explode the cap. The cap is positioned immediately adjacent to the end of an igniter wire such that igniter the wire is ignited by the explosion of the cap. The spring-loaded hammer is held against release by an overlying spoon pivotally installed on the top of the simulated grenade and secured against accidental release by a pin.