The vented pouring spout includes a main body and a valve system movable between a normally closed position and a fully opened position. The main body includes a first member and a second member. The valve system includes a valve member and two spaced-apart and parallel stems projecting from an inner side of the valve member into the first member. A push button is mounted within a housing and is in an axial force-transmitting engagement with the stems. The spout, among other things, can include a child-resistant closure (CRC) device that can be operated using a single finger, for instance the thumb or any other finger, and while holding a small container.