Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy 
You can also play Ricky Ricotta's Mighty Robot Vs. The Stupid Stinkbugs from Saturn and many other truly disgusting games at Dav Pilkey's Extra Crunchy Web Site O' Fun.
Disney Channel Games 
New games weekly. High scores are posted on the site.
Harry Potter: Wizard Challenge 
Hey, Muggles! Play all Harry Potter games. Enter into a magical world with favorite characters from the stories.
I Spy 
Seek and find games are fun, lots of surprises for everyone!
National Geographic Kids: Games 
Play Animal Jam, Dolphin Diving and other games.
Nick.com Games 
Large selection of games from the Nickelodeon television network.
PBS Kids Games 
Many games related to PBS Kids television shows. Also Adventure, Animal, Social Studies and Spelling Games.
Sesame Street Games 
Play games featuring all the Sesame Street characters.