Had to search for this thread after being gone for a week. Fitzi - those notes are hilarious! Keepers for sure.
I have to report that I did find the calvin and hobbes books and read a bit to DS4 last week. This morning, he gets up and says, "where's that calvin and hobbes book? I need to look for some ideas for mischief." (And for the first time ever, I spotted him reading a book by himself - so i'm still weighing the positives and negatives with this one!) And last week at the grocery store, he quoted Calvin while he was sitting in the cart: "Mom, go really fast and then let go!" I can only hope that someday we'll get a note like yours.
This is a beaut, Pauli; I love it that he is using 'mischief' at 4! I think we finally hid the books after we caught DS (then 5) wandering towards the coffee table one day carrying a hammer and a handful of nails (in one of the CH cartoons, Calvin pounds a large quantity of nails into the coffee table).
DS's (now 6) latest, BTW, came when we forgot to take him out for a promised pancake breakfast last weekend. When he realized we'd goofed, he told DW in ringing tones "You owe me restitution!" (borrowed from Peanuts' Sally). We rendered restitution the following morning.