Eighteen years ago, the prehistoric past collided with the present as time itself underwent a tremendous disruption, transporting huge swaths of the Cretaceous period into the twentieth century. Neighborhoods, towns, and cities were replaced by dense primeval jungles and modern humanity suddenly found itself sharing the world with fierce dinosaurs. In the end, desperate measures were taken to halt the disruptions and the crisis appeared to be over. Until...

Ms. Frizzle's class travels on the Magic School Bus to the Mesozoic Era in order to study dinosaurs.

When Mikey and Robbie Davis find a time portal in the Green Woods they gather their friends and are transported to a time when dinosaurs roamed the earth.

Eight-year-old Jack and his younger sister Annie find a magic treehouse, which whisks them back to an ancient time zone where they see live dinosaurs. Jack, ocho años de edad, y su hermana pequeña Annie, encuentran una casa de árbol mágica, que los lleva a una época antigua donde se encuentran con unos dinosaurios en vivo.

When a dinosaur passes through the portal to secure her egg, the Time Soldiers help distract her from doing damage to their town and, in the process, meet some mysterious men who have stolen the video record of their time travels.

"In this adventure, Jamie and Tess head to the Jurassic period to do a little prehistoric fishing. But they get more than they bargained for when they encounter an enormous plesiosaur with an equally enormous appetite!"--Back cover.

Dora and Diego travel back to the dinosaur age where they help a lost dinosaur get back to her family.