UPN Kids launched on September 10, 1995 with a one-hour block of cartoons consisting of Space Strikers and Teknoman.

[1] Unlike NBC, ABC, CBS, Fox and The WB (the latter of which debuted its own children's program block, Kids' WB, the day before UPN Kids made its debut), UPN ran its weekend morning children's programs on Sundays instead of Saturdays.

This eventually proved to be a conflict for UPN, as the more well-known Fox Kids block was given primacy in advertising and promotions by those affiliates (including the continuation of the local children's Fox Kids fan clubs run by those stations) over UPN's unproven children's programming.

On September 8, 1996, UPN Kids expanded the block to 2 hours with four new programs, which consist of Jumanji, The Mouse and the Monster, The Incredible Hulk and Bureau of Alien Detectors.

[2] In 1997, UPN incorporated live-action series aimed at teenagers, along with the animated shows targeted at a younger audience, with the addition of reruns of the syndicated dramedy series Sweet Valley High (based on the young adult novels by Francine Pascal) and a new comedy series, Breaker High (focused on a group of students attending a fictionalized Semester at Sea program, which featured a then-unknown Ryan Gosling among its main cast).