AllMovie

In this children's fantasy, four young boys visit the dinosaur exhibit at the New York city Museum of Natural History. They then row out onto Central Park Lake where they find a secret cave and paddle into a wondrous prehistoric world filled with the very dinosaurs they had just seen. As they float further into the cave, they find themselves in the Ice Age where they fall asleep. When they wake up, they find they are still in the museum and the whole glorious adventure was naught but a dream.