Collection of short stories by a variety of authors about young extraterrestrial beings. "Doorstep" by Keith Laumer: UFOs are often described as flying saucers; however, their shapes also resemble eggs. "Who's On First" by Lloyd Biggle, Jr.: If the children are this good, think of the adults. "In the Jaws of Danger" by Piers Anthony: Dentistry has all manner of unexpected perils. "The Witness" by Eric Frank Russell: It makes a bit of difference if the court knows the intent of the defendant. And the gender. And the age. "The Mississippi Saucer" by Frank Belknap Long: There is a reason why salmon return to a certain place to spawn. "Primary Education of the Camiroi" by R.A. Lafferty: The committee recommends that certain changes be made in light of this comparison. "Tween" by J.F. Bone: Evolution's taken steps to ensure that opposites attract. "Zoo" by Edward D. Hoch: This zookeeper is making money hand over fist. "Subcommittee" by Zenna Henderson: In the midst of peace negotiations between two species, it sometimes helps to cut to the chase. "Keyhole" by Murray Leinster: Who's teaching whom? "Kindergarten" by James E. Gunn: A theory to explain why Earth is a little confusing.