Discovery Kids on NBC  Discovery Kids on NBC was an American children's programming block that aired on NBC from October 5, 2002, to September 2, 2006. The block was produced under a time-lease agreement with Discovery Kids, and features a mixture of live-action and animated series originated on the cable network that met educational programming requirements defined by the Federal Communications Commission. In December 2001, NBC reached a partnership with Discovery Communications, in which its cable channel Discovery Kids would produce a new three-hour Saturday morning block for the network that would feature programming that met the educational programming guidelines enforced by the Children's Television Act. The block would replace "TNBC", a block of live-action series aimed at a teenage audience whose creation was motivated by the success of its series "Saved by the Bell". By 2001, TNBC had been suffering from declining viewership; according to Nielsen Media Research, the block was registering a median viewer age of 41. "Discovery Kids on NBC" debuted on October 5, 2002, with its initial lineup incorporating three new original series (the "Survivor"-style reality competition series "Endurance", and the scripted series "Scout's Safari" and "Strange Days at Blake Holsey High") and one existing Discovery Kids program ("Operation Junkyard"); the following year, "", a child-oriented spin-off of the TLC home renovation reality show "Trading Spaces" joined the lineup. The new block came about amidst growing children's programming synergies between broadcast and cable television networks. Prior to the Discovery agreement, CBS had launched a Nickelodeon-branded block in 2000 (following Nickelodeon parent Viacom's merger with CBS), while The WB had begun pooling programs from sister channel Cartoon Network onto its Kids' WB lineup as part of a growing cross-promotion arrangement between the cable channel and the block; in addition, the same month that "Discovery Kids on NBC" debuted, ABC relaunched its Saturday morning block as ABC Kids, expanding upon a programming agreement established in 2001 with sister network Disney Channel that later included select programming from Toon Disney. In September 2003, the block introduced educationally-oriented animated programs under the banner "Real Toons" – with two series, "Kenny the Shark" and "Tutenstein"; this marked the first time that NBC had aired animated series as part of its children's programming lineup since August 1992. In March 2006, Discovery declined to renew its contract with NBC for its Saturday morning block, citing a desire to focus its children's programming efforts exclusively on the Discovery Kids cable channel; in May of that year, NBC and Ion Media Networks unveiled a joint venture with Corus Entertainment, Scholastic and Classic Media known as Qubo, which would aim to provide educational programming aimed at children between 4 and 8 years of age.