When a strange, lumpy, green ball rolls to their feet, Fred and Pete are sure they've found treasure. But what is it? At the Museum of Cornish Treasures, Archie tells them that their treasure grew up in Cornwall under a big dome, and Suzy sends them to the Eden Project to find out more. Here, they meet Catherine who says their treasure is a type of fruit from a place far away. But how did the fruit get to Cornwall?

Suzy buzzes on the Treasure Comm and suggests Fred and Pete take a trip on a zip wire and explore the tropical dome. They meet Catherine again who reveals their treasure is a screw pine fruit. This fruit is usually found in hot countries in Asia and Africa but is able to grow in Eden’s dome because it's so warm inside. Catherine takes Fred and Pete on a plant hunt around the tropical dome. Catherine explains how fruits produce seeds which then grow into new trees that produce fruits themselves. Show less