Well, the cartoon boys could be looking confused, trying to figure out the difficult problems or maybe even daydreaming a little while doing homework.
The cartoon boy might be concentrating hard, frowning at difficult problems.
They might be concentrating hard, with their pencils in hand and frowns of focus on their faces.
Maybe they enjoy learning and see homework as a fun challenge.
The cartoon kid might be concentrating hard, frowning at the difficult problems.
The cartoon might show the kid struggling or concentrating hard. Maybe there are funny expressions or some distractions around.
The couple might be shown sitting at a desk, concentrating hard, with books and pencils scattered around.
They might be up to some mischief or trying to avoid being noticed for a surprise.
The scene might feature the girl looking thoughtful, with a determined expression on her face. Maybe there's a clock on the wall, indicating the passing time as she works diligently on her homework.
The scene usually shows a quiet room with a desk and the kid focused on the books and papers, maybe with a frown of concentration.
The scene might show the girl sitting at a desk, concentrating with a pen in hand and books spread out.