|Created by:|| Traci Paige Johnson|
|# of episodes:||17|
|Running time:||30 minutes|
|Original run:||August 2, 2004 - March 29, 2007|
Polka Dots is Blue's best friend, a sea-green plush toy who creates puzzles for others to solve. He often acts as a co-host to the show. Puppeteered by Peter Linz.
Frederica (also known as Fred) is one of Blue's other best friends that usually pretends it is her birthday everyday. Puppeteered by Cheryl Blaylock.
Roar E. Saurus (also known as Roary) is a dinosaur who likes to practice roaring. Puppeteered by Joey Mazzarino.
Joe is a human and Blue's caretaker. He is often seen alongside Sprinkles. Portrayed by Donovan Patton.
Sprinkles is Blue's baby brother. He is a somewhat shy spotted puppy. Puppeteered by Joey Mazzarino.
List of episodes
Season 1 (2004-2005)
- Snacktime Playdate (August 2, 2004)
- Fred's Birthday (November 24, 2004)
- Blue's Holiday Wishes (December 3, 2004)
- It's Hug Day! (January 7, 2005)
- Beyond Your Wildest Dreams! (April 18, 2005)
- The Power of the Alphabet (September 17, 2005)
- Meet Blue's Baby Brother (August 6, 2006)
Season 2 (2006-2007)
- Blue's Farm Playdate (January 26, 2007)
- Shape Detectives (February 2, 2007)
- Masterpiece Museum (February 9, 2007)
- World Travelers (February 16, 2007)
- Away Great Playdate (February 16, 2007)
- Sprinkles' Sleepover (March 26, 2007)
- Little Red Riding Blue (March 26, 2007)
- Music Stars (March 26, 2007)
- Knights of the Snack Table (March 27, 2007)
- Mathstronauts! (March 29, 2007)