The character is Pikachu, some kind of character from the Pokemon cartoon series.
I got inspiration for the cake from Pinterest.
I used graham crackers for the ears. I "sawed" them into the point with a knife very slowly (they will break easily if you don't saw back and forth slowly). Then covered them in icing for the correct coloring.
For the cupcakes I used candy corn for the ears (covered them with icing to make them the correct color) and chocolate chips for the eyes.
I think they turned out cute and his class knew what they were instantly, so at least they were recognizable!