[1] Attempts to reach a time-lease agreement deal with Disney were called off one week after negotiations started due to a dispute between Disney and UPN over how the block would be branded and the amount of E/I programming that Disney would provide for the block; UPN then entered into discussions with then-corporate sister Nickelodeon (both networks were owned by Viacom (now as "Paramount") to produce a new block, but never came to fruition and the cable network finally joined forces with CBS two years later.

[2] That February, UPN entered into an agreement with Saban Entertainment (then a subsidiary of Fox Family Worldwide, which Disney later acquired in 2001 and reunited 18 years later following the merger of 21st Century Fox along a library of kids' content) – which distributed two live-action series recently aired on the UPN Kids block around that time, Sweet Valley High and Breaker High – to broadcast the Sunday-to-Friday block.

The block also featured an alternate opening sequence, using more futuristic buildings and a theme similar to that used on One Saturday Morning.

In September 2002, the One Too branding was discontinued (due to Disney's One Saturday Morning replacing with ABC Kids); although the UPN block wasn't rebranded (with bumpers and promos simply being created for each individual show).

The block aired for the last time on August 31, 2003, with the time periods being turned over to UPN's affiliates; this left UPN as the only "big six" broadcast television network without children's programming (and for the rest of its existence through its 2006 shutdown, never again would UPN air any children's programming), and one of only two major commercial broadcast networks that did not air a children's programming block (the other being Pax TV, which discontinued its Pax Kids lineup in 2000, until returning children's programming as I: Independent Television through the 2006 launch of Qubo (joint venture of Canada-based Corus, NBCUniversal, and Scholastic), as a 24/7 network, it was pulled off the air in 2021 due to Ion's acquisition with Scripps).