Lucy has assigned Linus singing duties in their school’s upcoming Christmas play. Most people who are not egomaniacs would dread such a responsibility, and so it goes that the ingenuous blanket-hoarder comes up with Plan B.
The middle panels are what shine brightest. The ridiculous visual of Linus and Snoopy’s earnest gyrations followed by Lucy’s deity-defying scream in the face of her petrified sibling, while Snoopy observes all in abject terror. Kids go through the darnedest trauma!