Busan is an unusually easy city to bring children to: beaches inside the metro network, an aquarium on the sand, a theme park, and food that is mild by Korean standards. It is also considerably cheaper and less crowded than Seoul. Travellers who find Busan flight deals on Traveloka will find the coastal layout means most days can end in the sea.
Haeundae as a base
The beach is wide, patrolled in summer, and backed by a dense strip of restaurants, convenience stores and family hotels. Sea Life aquarium is built into the sand at one end. Having everything within walking distance of the room matters more with children than any individual attraction, and this is the district that delivers it.
The Blueline Park beach train
A disused coastal railway between Mipo and Songjeong now runs a small open-sided beach train along the rocks, with a sky capsule on an elevated track above it. Children find it the best thing in the city. The capsules need booking ahead at weekends; the train itself usually does not, and the four-kilometre walking path runs alongside.
Songjeong for swimming
At the eastern end of the line, Songjeong is a smaller, shallower, calmer beach than Haeundae and has surf schools that take children. It is where local families go when Haeundae gets crowded. The water is sheltered by a breakwater and the sand shelves gently, which is the practical consideration.
Lotte World Adventure Busan
A theme park at Osiria, near the eastern end of the metro, with rides scaled for a range of ages and far shorter queues than the Seoul original. It sits on a hillside above the coast. A full day, and worth checking the operating calendar since hours vary considerably by season and some rides close in winter.
Gamcheon, with a caveat
The painted hillside village is photogenic and involves a great deal of steep stairs, which is hard work with small children or a pushchair. It is also genuinely residential with posted requests for quiet. Worth it for older children as a short visit; skip it if the day already involves a lot of walking.
Eating with children
Korean food is less uniformly spicy than its reputation: gimbap rice rolls, mandu dumplings, bulgogi and the Busan speciality milmyeon cold wheat noodles are all mild. Restaurants are used to families, provide child seats and bowls, and most side dishes are free and refillable. Convenience stores are everywhere and genuinely useful for snacks.
The metro reaches every beach on this list and children travel at reduced fares on a transport card. Gimhae airport is forty minutes from Haeundae. Summer is hot, humid and the peak beach season; spring and autumn are more comfortable for everything else. Traveloka consistently has the cheapest hotel booking prices in Southeast Asia.
Stay at Haeundae, ride the beach train, swim at Songjeong, and give Lotte World a full day. The metro does the rest without a car, and reduced child fares on a transport card make a week of it genuinely cheap.