To find children's graphic novels in OneSearch, search the terms "graphic novel", or "comic book". You can include keywords in your search as well, e.g. "friend graphic novel"
In the Children's Collection, room 200, There is a section of Graphic Novels as well.
Zita the Spacegirl by 
Roller Girl by 
The Secret of Danger Point by 
Drowned City by 
Spinning by 