Susan Krebs

When the dinosaur families get trapped in a valley by an ice storm, one family of "spike tail" dinosaurs volunteers to leave since they consume more food than the others. Meanwhile, the young dinos and a new adult dinosaur named Mr. Thicknose, head out to bring back their friend Spike, who has left his friends to be with members of his own species. (imdb)

Professor Vandemeer works on a secret project for the US-Air-Force called DART: a very small helicopter for scouting and defense. When he gets killed, Colonel Denton gets under suspicion. His son Scott and Vandemeers daughter Karen believe in his innocence and search for the true murderer and his motives. (imdb)