It still brings a smile to my face when it's even mentioned. Best comic riff ever.
I met Watterson's elementary school principle from Ohio, he was a dead ringer for the guy in the comic strip.
"I yam what I yam"
"HugghUgghUggh.... Skeetendiddely Dumdeebo..."
My favorite is probably the time machine, where Ca.lvin dumps the duty of writing an essay on future Calvin about four hours. In the future.