2. The water cannon of claim 1 wherein the closure means comprise, a connected lever assembly pivotly secured to the top of the suction inlet tube; a tie rod pivotly connected to an intermediate portion of th lever having an eyelet at the bottom end thereof; a flexible connecting link having two ends, one of which is connected to the eyelet of the tie rod; a counter lever pivotly attached to the container adjacent the bottom thereof and attached to the flexible connecting link; a water inlet door secured to the counter lever pivotly positioned in alignment with the water inlet; and sealing means surrounding the periphery of the water inlet door whereby when the door is closed no water will leak from the container.

3. The water cannon of claim 2 further comprising, a plurality of water inlets adjacent the bottom of the container; a plurality of flexible connecting links each having two ends, one of which is connected to the eyelet of the tie rod; a plurality of counter levers pivotly attached to the container adjacent the bottom thereof and each attached to one of the flexible connecting links; a plurality of water inlet doors each secured to one of the counter levers pivotly positioned in alignment with the water inlets; and sealing means surrounding the periphery of each of the associated water inlet doors whereby when all doors are closed no water will leak from the container.

4. The water cannon of claim 1 wherein said closure means comprise, a circumferential strip which rotatively extends around the inner diameter of the container; an aperture located circumferentially around the circular strip in alignment with the water inlet; sealing means surrounding the aperture; and a peg firmly secured to the circular strip which extends through the water inlet whereby lateral force applied to the peg rotates the circumferential strip thereby closing the water inlet.

5. The water cannon of claim 4 further comprising a plurality of water inlets; a plurality of apertures located circumferentially around the circular strip each in alignment with one of the plurality of water inlets; and sealing means surrounding each of the plurality of apertures.

6. The water cannon of claim 1 further comprising a boat hull having a top and a bottom and forward, median and rearward portions secured to and surrounding the container below the barrel of the water gun whereby the water gun portion of the water cannon extends longitudinally from the median portion above the top of the forward portion of the boat huLl; seating means for supporting the operator of the water cannon secured to the rearward portion of the boat hull; manual motive means for propelling the boat hull through the water secured adjacent to the bottom of the boat hull and operatively positioned forward of the seating means to that the operator may propel the boat forward with his feet; manual steering means for varying the direction of the boat hull when it is being propelled through the water operatively positioned relative to the water gun, motive means and steering means whereby the operator may operate the water gun while steering and propelling the boat hull; and wherein the water inlet extends through the bottom of the boat hull.