This documentary is about 13 French teenagers who sail a large sailing ship 　　(with the help of two or three adults), following the same course Columbus 　　followed from Spain to the Yucatan Peninsula, with stops at various Caribbean 　　islands. 　　The boys, ages 10 to 15 years, form an integrated group and control all aspects 　　of the expedition, from navigation and maintenance to the filming of the voyage. 　　They also write reports for the press, radio and television and produce their 　　own monthly magazine. Many have been on board for at least a year and have taken 　　part in expeditions in the Mediterranean, the Black Sea, the Red Sea and the 　　Atlantic. Using only 19th century navigation equipment, they explore the 　　volcanoes of the Canary Island, go scuba diving in the Caribbean, walk the rain 　　forests of Venezuela, the jungles of Guatemala and even follow the migration of 　　the humpback whales. Other activities include swimming with dolphins, cave 　　exploring and camping out on the remote Canary Islands.