The Happy Hollisters and the Mystery of the Mexican Idol

Uncle Russ is headed to Mexico to gather research material for his cartoon strip, and he invites the Happy Hollisters to join him when his map showing the location of the long-lost Temple of the Laughing Idol is stolen. Deep in the jungles of Yucatan, they stumble upon the ancient monument and discover a ring of smugglers who are looting valuable artifacts.