The Children's Museum at Jeju National Museum is open for walk-in visits 09:30–18:00, with last entry at 17:30. Admission is free, and advance reservations are not required. Activities are designed mainly for ages 6–10; children aged five or younger require extra supervision. Children should enter with an adult guardian, and the museum recommends one adult for every one to three children. For groups, it recommends one leader per seven preschoolers or at least one leader per ten primary-school children. Crowding may lead to waits or capacity restrictions. Normal closures include Mondays, January 1 and Lunar New Year and Chuseok days. The official visitor tips carry an update dated October 16, 2026.