PURPOSE:To allow a model water bird, etc., to swim along the rudder by injecting pressure water which goes in from an inflow port, from an injection port, and using its reaction. CONSTITUTION:A motor-driven pump 3 pumps up water 2 of a pond from an intake 3b, and executes its force feed by a suction main hose 4 to a hydraulic pressure controller 5. Its hydraulic pressure controller 5 allows the water 2 which is subjected to force feed from the motor-driven pump 3 to flow to each force feed hose 6 by dividing the water and feeds it out by adjusting each hydraulic pressure, and the number of its flow diversions is attached by the number of model water birds, etc., 9. In such a state, water is exhausted from an injection port 9b by hydraulic pressure adjusted by the hydraulic pressure controller 5 to which water is subjected to force feed from a floating hose 8, and an animal 9 such a model water bird and fish, etc., connected to the tip of this floating hose 8 executes a unique operation and swims on the water surface by a reaction of its jet. In such a way, an elaborate plan is divised to pond water and mind is softened.
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