Replace three cubes from Original Rory's Story Cubes with one of the new mix sets. Swapping a few images will totally transform the theme of the stories you tell. It's just like adding spice to a meal!The Prehistoria set allows you to weave Tales of primeval predators and time-travel back to long forgotten eras.One of the first three sets in the series is Rory's Story Cubes: "Prehistoria." Simply mix up these three dice wiht other Rory's Story Cubes to weave tales of primeval predators. Other Rory's Story Cubes MIX sets currently available are and "Clues" (to craft tales of cracking crime) and "Enchanted" to conjure up fantastic fairytales. The three cube MIX sets are a perfect pocket money buy. They are also highly collectable. You only have to swap a few images to completely change the theme of a story. It's like adding a strong spice to a meal!