[1] On September 14, 2002, the block was rebranded as Nick on CBS, and its programming content expanded to animated Nickelodeon series aimed at children between the ages of 2 and 12, in addition to two returning Nick Jr. series Blue's Clues and Dora the Explorer.

The rebranding also introduced a new logo with three circles with different colors (orange for Nick, green for the word "On", and blue for CBS) alongside bumpers and promos animated by Primal Screen.

On December 31, 2005, Viacom formally split under the shared control of National Amusements (owned by the late Sumner Redstone), with CBS and all related broadcasting, television production and distribution properties as well as some non-production entities becoming part of the standalone company CBS Corporation, while Nickelodeon and its parent subsidiary MTV Networks became part of a new company under the Viacom name.

Although the block was intended to air on Saturday mornings, some CBS affiliates deferred certain programs aired within the block to Sunday mornings, or (in the case of affiliates in the Western United States) Saturday afternoons due to breaking news or severe weather coverage, or regional or select national sports broadcasts (especially in the case of college football and basketball tournaments) scheduled in earlier Saturday timeslots as makegoods to comply with the E/I regulations.

Some stations also tape delayed the entire block in order to accommodate local weekend morning newscasts, the Saturday edition of The Early Show, or other programs of local interest (such as real estate or lifestyle programs).