On "Take Your Kid to Work Day," eight-year-old Archie discovers that his father drives a space taxi that shuttles aliens from one area of the universe to another.

This time a strange flashing cube from the magic suitcase sends them to a nearby city, Hadenstown, in the future, and they find themselves surrounded by flying cars, tall glass buildings, and robots; but Randall is also there, and the two children must scramble to figure out just what the mysterious cube is and get it back where it belongs--and their quest brings Chase face-to-face with his future self, Professor Teslar.

On a visit to the Natural History Museum, Chase and Ava seem on the verge of finding out something important about the mysterious Randall, the missing scientist Finn, and the woman who gave them the suitcase filled with magical objects, when the dinosaur egg from the suitcase (they thought it was a potato) sends them back to dinosaur times--where they have to return the egg to the correct brontosaurus nest, while eluding hungry dinosaurs, and Randall,...

Chase and Ava find an old suitcase filled with strange objects. One of the objects looks like a dragon-headed doorknob... Suddenly Chase and Ava find themselves jumping back in time to King Arthur's castle! They meet the king's wizard Merlin and soon discover what the dragon-headed doorknob really is. It turns out they have an important job to do: They must save the king! But a bad guy is after them... How will Chase and Ava get back home? They will...

Ava and Chase want some more information before they embark on another adventure in time, but the woman who gave them the suitcase filled with magical objects is not being helpful, and when Chase picks up the scarab of King Tutankamun they find themselves transported not to ancient Egypt, but to Egypt on the day King Tut's tomb is discovered--and they must get the artefact back into the tomb while avoiding Randall who has arrived before them.