The channel would eventually split its programming into three distinct blocks: Playhouse Disney (which debuted in May 1997, focusing on series aimed at preschoolers), Vault Disney (which began as a Sunday-only nighttime block in September 1997 before expanding to seven nights a week by late 1998, featuring older Disney programs, older television specials and some of the older feature films shifted off its daytime and prime time lineup), and Zoog Disney (a weekend afternoon and evening lineup hosted by anthropomorphic robot/alien hybrid characters called "Zoogs" that was introduced in August 1998, compromising original and acquired series aimed at preteens and teens). The Zoog Disney brand would later expand to encompass most of the channel's weekend daytime and evening schedule under the "Zoog Weekendz" banner in June 2000.