The 'Deullak Nallak Arirang' children's space at Busan Marine Natural History Museum is listed as free. Tue–Fri 10:00–11:30 is for groups, while 13:00–17:30 is normally individual drop-in, except a 15:00–15:30 maintenance break. Weekends/holidays run five 60-minute sessions: 09:30, 11:00, 13:30, 15:00 and 16:30. Young children and primary-school pupils attend with guardians. Individuals register on site; capacity controls can apply during crowding. Separate group education programs may require their own booking. Help 051-550-8828.