Amazon Adventure - Long Island teenagers Hal and Roger Hunt explore uncharted Amazon River with their father, expert naturalist John Hunt for his exotic animal collection. Someone threatens their mother back home, so John returns. Alone, the boys face hostile natives, dangerous rapids and wild animals, delayed by a brutal enemy hot on their trail. South Sea Adventure - Hal and Roger search the beautiful waters of the South Seas for unusual sea creatures, with a side mission for pearl oyster-beds of a remote lagoon. Other visitors to Polynesia conspire to steal the pearls. The boys learn the true nature of friendship and sacrifice, and how far men will go to get what they want. Abandonment on a deserted barren atoll tests their survival skills.