The Kinder Smart Interactive Learning Series is a set of 18 paper-based posters for children ages 3-6 that uses a talking pen to provide an interactive, multi-sensorial learning experience. The pen allows children to hear audio content like facts, questions, and sounds by touching the posters, and also enables them to record and play back their own voice to aid in speaking and expression. The series aims to develop early learning skills, motor skills, and imagination through a screen-free, interactive format that covers various topics like animals, the alphabet, and body parts.