“The only permanent rule in Calvinball is that you can never play it the same way twice! (Calvin)”

“The way Calvin's brain is wired you can almost hear the fuses blowing.”

“[Calvin and Hobbes are playing Scrabble.] Calvin: Ha! I've got a great word and it's on a "Double word score" box! Hobbes: "ZQFMGB" isn't a word! It doesn't even have a vowel! Calvin: It is so a word! It's a worm found in New Guinea! Everyone knows that! Hobbes: I'm looking it up. Calvin: You do, and I'll look up that 12-letter word you played with all the Xs and Js! Hobbes: What's your score for ZQFMGB? Calvin: 957.”

“[Calvin, who has the chicken pox, calls Susie on the telephone.] Susie: Hello? Calvin: Hi, Susie! It's me, Calvin! I was wondering if you'd like to come over and play. Susie: Why, sure! Boy, I don't think you've ever invited me to... Calvin's Mom: Calvin, what are you doing? Calvin: Nothing, Mom. Go away. Calvin's Mom: You're contagious! You can't have anyone over to play! Calvin: Shhhh! Shhhh! You'll spoil the whole thing! I was going to trick Susie into catching... HEY! OW! LET GO! Susie: [Hanging up the phone] Any chance of getting transferred, Dad?”

“No sport is less organized than Calvinball.”

“Ms. Wormwood: Calvin, can you tell us what Lewis and Clark did? Calvin: No, but I can recite the secret superhero origin of each member of Captain Napalm's Thermonuclear League of Liberty. Ms. Wormwood: See me after class, Calvin. Calvin: [retrospectively] I'm not dumb. I just have a command of thoroughly useless information.”

“Calvin is hammering nails into coffee table.Mom: CALVIN WHAT ARE YOU DOING TO THE COFFEE TABLE?!?Calvin: Is this some sort of trick question, or what?”