It can happen anywhere--the sudden appearance of an innocuous object that turns out to be a valuable and historic relic. This time the setting is an American Trade Fair in Moscow, the children are members of a typical American family chosen to demonstrate the typical American home, and the objects are two eggs, plaster outside and gold within, given them by an elderly Russian. Seems the old gentleman was a jeweler to the Czar, a disciple of Faberge, and the eggs are toys he made for the ubiquitous Princess Anastasia. The children do some sightseeing and meet some typical Russians, but it's a short, superficial visit. The change of scene doesn't do much for a familiar situation.