The Sad Kids
From Homestar Runner Wiki
The Two Kids (A boy and a girl) were created by Strong Sad in Homestarloween Party. They often appear in commercials for Fluffy Puff Marshmallows. They have the same voice, and don't actually say anything except for confused statements, such as "Huh?", "What?", and "Weird." They dressed up as The King Of Town and a witch for the Malloween Commercial.
It is believed that they represent "Want" and "Ignorance" from "A Christmas Carol," by Charles Dickens. They were once referred to as "The Sad Kids" on the weekly sketchbook.