Kids' learning: Get an early learning children's book. Multiple benefits: Exercises to build child-parental interactions, cognitive responses, and logical thinking. What's included: One smart pen with a built in LED light and sound, plus 12 learning cards. Material: Safe, non-toxic plastic. Power: 2x AA batteries. Interactive learning: Use the smart pen to choose your answer and it will tell you if you were correct! Children's Interactive Smart Pen & Book | Living Social