Complex sentence: His series of cartoons presented basic ideas in Torah in a humorous way, using a fat character called Schlemiel who would always misunderstand and a couple of boys who would correct him.
Split into simpler sentences: His series of cartoons presented in a humorous way, illustrating basic ideas in Torah. To do this, he invented a fat character called Schlemiel who would always misunderstand things, and then there would be a couple of boys who would correct him.