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Other kids' games are all such a bore! They've got to have rules and they gotta keep score! Calvinball is better by far! It's never the same! It's always bizarre! You don't need a team or a referree! You know that it's great, 'cause it's named after me! If you wanna.... Uh, feel free to harmonize with Hobbes on the rumma tum tums. This was a mistake. Calvin sings a Calvinball song about having a game that's never the same, it's always bizarre. It's named after him. He tells Rosalyn to harmonize with Hobbes on the rumma tum tums.
Rosalyn thinks this was a mistake.