Hurray for Hippos - When the Explorers take a dip to cool down after playing a game of "Simon Says" they encounter a large, yawning hippo. They make the most of the situation by learning all about this large animal. Shell Game - While hunting for sea shells Sammy stumbles upon a huge shell. The Explorers soon discover this isn't any old shell when a head pops out and the shell starts to crawl away. Sammy and his friends go on a quest to learn about land and sea turtles.