Toad in his swimsuit in Frog and Toad Are Friends. I can relate.
The ridiculous list of sad things in the Tearwater Tea story in Owl At Home. Every once in a while, my nine-year-old son will walk through the kitchen and, in a melodramatic and tearful voice, will say, "Mashed potatoes left on a plate because no one wanted to eat them" and then he will laugh and laugh. The list has the same effect on me.