I am planning to create a pictograph about commas. I was inspired by the visual puns in the first link. Because I want to teach my audience about the proper use of commas, my pictograph will give more information about the topic, while staying clean and simple (I hope!).
Right now I'm leaning toward doing something with serial commas. I want to show its position in a list and play off the word "serial" ("cereal"?).