While a great many Calvin and Hobbes comic strips take place almost entirely in Calvins creative imagination (including the very existence of Hobbes, though that point is debatable), there are just as many that highlight the highs and lows of being a kid beyond imaginative play. Sometimes that includes Calvin in school, or playing organized sports with other kids. However, theres one ongoing activity that Calvin seems to enjoy more than any other: snowball fights.

https://screenrant.com/most-epic-calvin-and-hobbes-snowball-fights/