Complete 5 top-secret spy science missions with the National Geographic Secret Message Science Lab! This exciting spy kit gives kids the chance to decode a message and make their own secret code which they can use again and again. Theyll also use science to hide and reveal messages theyve created and have a blast experimenting with pH science as they learn to create a fizzy reaction. Easy-to-follow instructions make each mission fun to complete and provide fascinating insights into spy history and the science at work in the experiments. Kids will be thrilled with the spy science skills and techniques they learn! Get the Secret Message Science Lab today and let the fun begin!