A brother and a sister will be charmed to follow a magic ball leading them to a trap. With the advice and help of an owl, a condor, and an old man, the brother will find a way to help his sister. In the afterword, we talk more about the Andean Mountains. We finish the program with a riddle.
Source: https://www.storiestogrowby.org/story/magic-ball/
Other sources: book Latin American Tales, From the Pampas to the Pyramids of Mexico, stories collected by Genevieve Barlow. Rand Mc Nally & Company. 1966