In its first few years, Noggin's original productions were aimed at pre-teens and encouraged online Audience Participation. Viewers could submit content through Noggin.com and see it aired live on the channel. Noggin's first flagship series, Phred On Your Head Show, featured an animated host who responded to users on Noggin.com.
In 2002, Noggin split its lineup into two age groups. Teen-oriented shows were moved to a new watershed block called The N, while Noggin itself became a preschool brand. Daytime shows were introduced by on-air hosts, most notably the animated characters Moose and Zee.
The most iconic element of Noggin is its character logo: the bottom half of a smiling face. To show what Noggin is "thinking" of, the upper half of the head is replaced with symbols reflecting a certain theme. For example, during the spring, flowers pop out of it.
The original Noggin channel closed on September 28, 2009, when it was replaced by a 24-hour Nick Jr. channel. In 2015, Noggin.com was revived and the brand was relaunched as a mobile streaming service for preschoolers.