(Strip Number 4966, Original Publication Date, 17 May 1988)
Panel 1: We find ourselves watching John comment on the fact that Lizzie is barefoot and asking where her shoes are. She tells him that they're up in a tree.
Panel 2: As she points them out, she tells him that she tied the laces together, swung them around and they ended up up there.
Panel 3: Since he's gonna need a ladder to get them down again, he asks her why she did it.
Panel 4: Since she doesn't have any common sense, she says that Mommy said that if she was gonna take her shoes off, she had to put them where she could find them. (Hint: Lizzie doesn't realize that Elly didn't want her taking her shoes off at all because she's sort of thick.)
Summary: Once again, we have to contend with the fact that neither parent wants to especially admit that their kids aren't especially all that bright. They'd rather live in a world where they were cleverly plotting to ruin them than in the real world of their being too dumb to live.