a pressurized water toy providing a pressure actuated pulsator for shooting water in consecutive pulses . the pressure actuated pulsator includes expansible inlet and outlet tubing , a reservoir for the temporary retention of water , and a sphere - shaped obturator for temporarily blocking the flow of water through the outlet tubing . flow of pressurized water into the expansible tubing expands and elongates the tubing and forces a seal to be formed by biasing the sphere - shaped obturator against a first end of the outlet tubing compressing a spring . a buildup of pressure behind the obturator causes the expansible tubing to expand and permit passage of the pressurized water around the obturator and into and through the nozzle . when the pressure behind the obturator drops below a certain level , the obturator again blocks the orifice into the outlet tubing causing a buildup of pressure there behind and the cycling of pulse of water flow continues .