 The entire Simpson family was designed so that they would be recognizable in <unk> . The family was <unk> drawn , because Groening had submitted basic sketches to the animators , assuming they would clean them up ; instead , they just traced over his drawings . Maggie 's physical features are generally not used in other characters ; for example , in the later seasons , no character other than Lisa shares her hairline . While designing Maggie and Lisa , Groening " couldn 't be bothered to even think about girls ' hair styles " . At the time , Groening was primarily drawing in black and white and when designing Lisa and Maggie , he " just gave them this kind of spiky <unk> hair style , not thinking that they would eventually be drawn in color " . 
