The Kindergartners are making up their own unique group among the students, the kindergarteners live as uncivilized, and even dangerous, little urchins who wear face paint, carry tribal weapons, harass the older children and have even attempted to cannibalistically eat them (as seen in the first and other episodes). Two kindergartners, however, Hector and Tubby, are on good terms with the main characters of the show.
Hector is a kindergartner who calls Gus "Safety Man" and he admires him. He was part of a group that the kids mentored.
Tubby is a red haired, overweight kindergartner who yet is really fast as shown in the episode "The Kindergarten Derby". He is one of Mikey's best friends. He and Mikey won the derby and Tubby told King Bob to abolish the Kindergarten Derby and he did.
Captain Sticky is the king of the kindergartners and has purple around his lips from eating candy and wears a paper crown. T.J. calls him Captain Sticky "for obvious reasons" (he saw Captain Sticky eat candy, then wipe his hand on himself).
Gilbert is a very fast kindergartener (both in speed and speech), Gilbert is King Bob's pick to win the Kindergarten Derby in the episode "The Kindergarten Derby". He loses the derby to Tubby.
Cindy is a girl with long blonde hair. In the episode "The Kindergarten Derby", T.J. and his gang (except for Mikey) pick her to win the Kindergarten Derby. She has a tendency to get distracted.
Hector's voice: Eric
Tubby's voice: Brian
Captain Sticky's voice: Paul
Gilbert's voice: Evil Genius/Brian/Zack
Cindy's voice: Emma
Emma's voice: Amy (UK)
Jake's voice: Paul
Spencer's voice: Joey
Zedd's voice: Steven
Brittany Armbruster's voice: Princess
Brittany Boulet's voice: Kayla
Brittany Quinlan's voice: Catherine
Brittany Tomassian's voice: Amy (UK)
Friends: TJ Detweiler, Vince LaSSao, Ashley Spinelli, Gretchen Grundler, Mikey Blumberg, Gus Griswald, Randall Weems, Menlo, Miss Finster, Principal Prickly, Miss Grotke, the Ashleys, Scribe Kid, Jordan and Jerome, King Bob and other good Third Street School students
Enemies: Earwin Lawson, Gelman, Conrad Mundy, Greg Skeens, Sue Bob Murphy, Lazy Kid, Chucko Kowalski, Jocko, Buster, Cheay, Koreo and Kurst the Worst
Likes: Chasing after Big Kids and getting along with Big Kids
Dislikes: Being outrun by Big Kids, troublemakers causing trouble (mainly Lawson) and being framed by troublemakers