Description: The number of overseas Koreans worldwide has steadily increased, now surpassing 7.4 million. For overseas Koreans everywhere to live with a healthy sense of identity and pride, Korean language education tailored to their unique circumstances is essential. Because language development varies significantly by age, it is important to provide Korean language education suited to each age group. Building on its previous achievements in developing customized teaching materials, the National Institute of Korean Language has been working to create Korean language educational resources for preschool-age overseas Korean children (ages 3-6). In 2017, foundational research and needs assessments were conducted, and in 2018, the materials were field-tested and refined based on feedback. The development team included experts in Korean language education, early childhood education, and overseas Korean education. As a result, the "Fun Korean for Preschoolers Around the World" series was published, consisting of 6 activity books for children, 2 teacher's guides, 1 Hangeul activity book, and 1 big picture book. These educational materials are designed to be easy and convenient for overseas Korean children, teachers, and parents alike to use. Children can enjoyably learn Korean through a wide range of content; teachers can flexibly use the various activity books according to their educational goals; and parents can naturally incorporate the Korean learned at school into daily life at home through family-linked activities. In particular, these materials were developed to enhance children's bilingual abilities and to cultivate a healthy sense of linguistic and cultural identity. They are rich in content about the Korean language and culture, and every effort was made to showcase the diverse aspects of language and culture. We hope that with "Fun Korean for Preschoolers Around the World," many overseas Korean children will enjoy learning Korean with excitement. We extend our heartfelt thanks to the development team and everyone at the publishing house who devoted their care and effort to bringing these educational materials to life.