It is June 2006 in St. John, a town in Northwest Indiana, and five siblings find out about the existence of dinosaurs through their neighbors who actually visited them. At a swimming party, the neighbors give the three younger siblings a book with a T-Rex's number on it. When all five kids visit Galavanti Island, they help Dacston, a T-Rex, Valpatic, a velociraptor, Jokie, a brachiosaurus, and Sammy, a stegosaurus, locate a case of saxophones that Selfish Arnie, Dacston's cousin, has taken from all of the citizens of Galavanti Island.

Summer of 2006 begins in Valparaiso, Indiana, and two siblings acquire a video game that lets them go to the island of Wakahakai to meet a cool polar bear and his friends, including a forensics science fanatic, an athletic walrus, a crazy penguin, a distinguished snowman, a simplistic Eskimo pig, and a beautiful princess. Together, they must keep Darveda, Nelson, and Hilda from taking part of Winderplassic Estate.

It is the summer of 2014 in St. John, Indiana, a small town in Northwest Indiana about 45 minutes away from Chicago. There is a lot going on this summer, yet nothing at the same time. Andrew Grzedek just recently graduates from college and moves in with his two cousins and mutual friend. Caleb, his younger brother of two years, is still trying to keep his band going strong. Everyone in their family is constantly making food. His sister, Alyssa, reunites with her good friend who moved back here from California. And no one else has much direction on what their plans will be for the summer.

It is June 2006, and, after school lets out for the summer in Crown Point, Indiana, five boys find out about a robot in Texamilio, a supposedly fictitious island due west of the eight Hawaii Islands. When they meet Rockybado and his two close Bobino comrades, they are all confronted by Susan and Claude McSmith, who are both out to steal Rockybado's position as King of Texamilio, after a sour debate regarding physics in high school.