"When Freddie, Chipper, Darla, and Mr. Chewy step into Freddie's sandbox, something terrifying happens. They're taken back in time, millions of years, when dinosaurs roamed the planet! They have no idea how it happened...all they know is that giant dinosaurs are everywhere. Danger is waiting for them at every corner, and the three first graders and Mr. Chewy must outwit the terrifying, giant lizards who want to gobble them up for lunch! Will they escape the clutches of the horrible beasts and return home safely, or will they be trapped in item ... forever?