What is the world's longest river? Where in South America do locals speak Portuguese? What civilization built the stone buildings of Machu Picchu? Explore interesting and exciting places around the world. Learn facts about both the natural world and the manmade world. Our planet is a cool and amazing place - why not go exploring! Activity cards keep everyone amused and having fun, while knowledge cards help kids learn. Additional facts are included on the cards to make the topics more interesting.