Reaction toy arrangement and method

A fluid discharge reaction-propelled toy missile arrangement capable of formation in multiple stages or units releasably interconnected as a function of internal propulsive pressure in the succeeding stages or units, or capable of individual unit single stage use, if desired. A self-sealing lateral inlet valve separate and spaced from the fluid discharge propulsion orifice of an individual missile unit enables individual unit pressurization from an external fluid pressure source. Missiles are launched from a ground-launching unit which may have a fluid pressurizing inlet and a fluid pressurizable releasable missile-holding connection, or may have other releasable missile-holding connection, and launch simulation enhancement can be provided, if desired, by controlled-release lateral liquid spray from one or more discharge orifices in the launching unit and separate from the fluid pressurizing inlet therefor.