Kindergartners are savage young children who love making art, sometimes even wearing it, and always wear fingerpaint on their faces. They resemble Native Americans and only appeared in "Operation: M.E.S.S.A.G.E." They went after Numbuh 2 and old Rickety, his horse, because past 4th graders (specifically, the Six-Gum Gang) stole their milk money. They played Duck Duck Goose to cut the ropes tied to a chair that he was sitting on until Numbuh 2 said he would help them.