This is Hungary's family seaside: warm shallow water, municipal beaches with playgrounds and slides, and a handful of purpose-built parks a short drive inland — all of it seasonal, and most of it shut by October.
Kisfaludy strand, Balatonfüred
The town's main paid beach, with two playgrounds, water slides, sports courts, equipment hire, lifeguards and a baby-changing room. Adults 2,200 Ft, children and students 1,400 Ft; open 08:00–19:00 in the main season.
Annagora Aquapark, Balatonfüred
Water park on the edge of Balatonfüred with slides ranging from gentle to the Kamikaze, wave pools and shallow areas for smaller children. It is a summer-season operation, so check the opening dates and hours before you build a day around it.
BalatoniBob, Balatonfűzfő
Two rail-mounted bob tracks totalling 1.5 km, one with a 360-degree bend and one with a lit tunnel, running at about 40 km/h with harnesses and automatic brakes. A run is 1,499 Ft for adults and 1,299 Ft for children; the playground, lookout tower and fitness park alongside are free, 09:30–18:00.
Ride the Szántód–Tihany ferry
Ten minutes across the narrowest point of the lake on BAHART's car ferry, standing on the open deck, with departures from around 07:00. Cheap entertainment, and it doubles as transport between the shores.
South shore for small children
The south side shelves so gently that you can wade a long way out and still be at knee or waist height, which is why Hungarian families with toddlers head there. The north shore drops away much faster.