Calvin: ME TARZAN! KING OF JUNGLE! Suzy: Nice underpants. Does your mom know you're over here like this? Calvin:...I don't think Jane EVER said that to Tarzan.

Who was the guy who first looked at a cow and said 'I think I’ll drink whatever comes out of these when I squeeze ’em?

It seems like once people grow up, they have no idea what's cool.

It's always better to leave the party early.

Calvin: Today for show and tell, I've brought a tiny miracle of nature: a single snowflake! I think we might all learn a lesson from how this utterly unique and exquisite crystal turns into an ordinary, boring molecule of water just like every other one when you bring it into the classroom. And now, while the analogy sinks in, I will be leaving you drips and going outside.

At school, new ideas are thrust at you every day. Out in the world, you’ll have to find the inner motivation to search for new ideas on your own. With any luck at all, you’ll never need to take an idea and squeeze a punchline out of it, but as bright, creative people, you’ll be called upon to generate ideas and solutions all your lives. Letting your mind play is the best way to solve problems.

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