"My Big World" is a first look at geography and science for children aged 4+ to enjoy with their parents. Throughout the book a little girl called Koko and a little boy called Alex ask questions about the world while intrepid explorers go on adventures to find out how and where we live. Starting from inside the home, Koko and Alex move on to explore the wider world. Step by step the reader encounters different plants and animals, exploring various locations around the world and even visiting outer space! Children explore each topic by playing and learning. Activities, which include things to do on and off the page such as games, recipes and craft activities, are announced by a graphic symbol of a pair of hands. Adults will probably help children with all the activities, but more complicated procedures, involving cutting and baking, are flagged as requiring adult supervision.