How does LJ trick kenny in the worlds greatest dinosaurwar

They play Americans vs. Nazis, and Rufus does not even mind being the Nazis. The only other boy Kenny used to play dinosaurs with was LJ Jones, but LJ had a habit of stealing the dinosaurs. He pulled his biggest trick when they played a game called World's Greatest Dinosaur War Ever, and convinced Kenny that they had to bury the dinosaurs that were affected by radiation. When Kenny forgot about the buried ones, LJ dug them up and stole them.