On November 7, 2025, the Elderly Health Promotion Project, Faculty of Nursing, Mahidol University, organized the activity titled “Sing with Harmony” at Rooms 4205–4207, Faculty of Nursing Dormitory, Mahidol University. The activity aimed to promote mental health and happiness among the project’s elderly members through choral singing. The event was honored by Dr. Rit Supsomboon from the College of Music, Mahidol University, who served as the guest speaker. Dr. Rit shared his expertise and led the elderly participants in joyful singing activities, creating a warm, friendly, and relaxing atmosphere. This activity provided an opportunity for the elderly participants to relieve stress, connect with friends, and share happiness through music fostering friendship and enhancing overall well-being both physically and mentally.