Much humour is character-based, often joking at traits such as Sheldon's geekiness, Gramp's old age or Arthur's over-inflated ego.
A running joke in the strip was that boy genius often forgets about his company, preferring to concern himself with more everyday affairs.
Over time, references to this aspect of his character diminished, with modern strips omitting it altogether, depicting Sheldo as an ordinary (if extremely nerdy) ten-year-old boy.
Unlike Sheldon, he's captivated with the Sheldonsoft billions, and constantly has visions of shopping sprees at The Sharper Image.
It is known throughout the strip that Arthur has a deep hatred for chickens, and a strong desire for pancakes, Shakira, Jessica Simpson, and Catherine Zeta-Jones.
He has also won the Pentathlon in the Olympics, earned a Mexican pilot's license, gone to space as a cosmonaut from Baikonur, and dated Betty White in São Paulo.
Oso is mostly shown running around in circles, constantly barking (or, as it is termed in the strip, "hyping"), and acting as "Rex Chestington's" horse.
Her pet cat, Li'l Butter, appears in several other comics- frequently in danger due to his sheer stupidity.
[2] The character Sheldon first appeared in a minor role in Kellett's comic strip Four Food Groups of the Apocalypse, which ran in the University of Notre Dame's student newspaper The Observer from 1993 to 1996.
On November 1, 2007, Kellett left Blank Label Comics and joined with Scott Kurtz of PvP, Kris Straub of Starslip Crisis, and Brad Guigar of Evil Inc. to form a new webcomics collective, Halfpixel.com.