October 22, 1952: Thanks for clarifying, girls

Instances like this can't be good for a kid's self-esteem. It is difficult to imagine, by the way, these little kids playing bridge. Charlie Brown's supposed to be about four or five right now, although it's possible that it's not Contract Bridge.

I'd like to point out that Charlie Brown breaks the fourth wall in the last panel.

May 18, 1951: Prototype of Calvin

Charlie Brown breaks the fourth wall.  To answer his question, yes, we would.

Bill Watterson has listed Peanuts as an influence on Calvin & Hobbes, and the similarity is remarkably close here.  This is exactly the kind of thing Calvin would do, right down to gloating about it to the reader.  It seems to me that early Peanuts is probably a greater influence on Calvin & Hobbes than later strips.