active activities adventure angles appearance children children’s-area children’s-playground color colored colorful colors colour coloured colourful colours cool cooling equipment families fountain fountains fun leisure multiple multiple-outlets pipes piping play playground playing pour pouring safety sheltered slides spout spouting stream streams supervised water water-playground wet wet-area flow flowing light lights night park peaceful relaxing serenity city Cosmopolis dark glow refreshing spectacle splash splashing spray spraying squirting streaming surface surfaces surrounds textures tiled Torun turbulence turbulent water-feature