Eleven-year-old Dinky Watson's wild story about his recent trip to the moon enthralls Eb and Lisa. Oliver believes none of it, especially after the kid sells Lisa a "moon rock" for $14. But once the rock stars beeping under the moonlight (and whenever Arnold oinks at it), Oliver suspects he's the subject of a practical joke. Oliver has his doctor X-ray it, but comes up with nothing. Fearing he's cracking up, he ships it off to NASA for their scientists to examine.
—Jay Phelps <jaynashvil@aol.com>