Abstract: A water playing system includes an infrared sensor for sensing people, a display module for displaying still image or moving image, a jet module for jetting the water into the water playing pool, and a control computer for controlling to display the still image or the moving image by the display module and to jet the water by the jet module when the people are sensed by the infrared sensor.

Abstract: Provided is an assembly type block module for water playing, including: a plurality of unit assembly blocks including: a body; an inner passage formed in the interior of the body such that fluid flows through the inner passage; and coupling parts detachably coupled to corresponding coupling parts of other unit assembly blocks such that the inner passages thereof are communicated with each other at any one of opposite ends of the body, wherein the unit assembly blocks have different shapes of the bodies and different forms of inner passages, fluid is supplied from an external fluid supply source while the unit assembly blocks are assembled, and the supplied fluid is discharged to the outside through the inner passage of the unit assembly block located at the extreme end after flowing through the inner passages of the unit assembly blocks.