Nickelodeon used a special logo for its animated Nicktoons as early as 1991; they soon spawned their own channel Nicktoons TV (now known as NickToons) in 2002.
Nickelodeon's programming blocks SNICK and TEENick had their own distinct logos. The standalone TeenNick channel also has its own logo as well as a throwback block currently known as NickRewind.
Nickelodeon's preschool block Nick Jr. has had several logos since it launched in 1988, which were eventually carried over to its standalone 24-hour channel.
1993-2003 Nick Jr. logo
2006-2010 Logo
Australia Logo
Toucans
Stars
Birds
1995 Grabbing Son Logo
Nick Jr. on CBS (2000-2002)
2002 Hugging Logo
2004 Armadillos
2006 Elephants
2004 Horses
2005 Raccoons; this was used as the Nick Jr. On Demand logo and the on-screen bug for split-screen credits
2006 Bats; there is also an on-screen bug with this during Halloween
2006 Ghosts; there is also an on-screen bug with this during Halloween
Teddy Bears; this was used as an on-screen bug from 2006-2008.
2003 Frog logo, commonly seen on the opening logo of Nick Jr. DVD prints
Noggin, a channel created by Nickelodeon and Sesame Workshop, launched in 1999 with its own logo. The channel also used logos for its nighttime blocks The Hubbub (2001) and The N (2002).
Thinking
Talking
Beaker
Beaker (print version)
Print version
Logo without face
Bubbles
Flower used from February 2, 1999 to April 6, 2003