Baltic weather can stay gray, wet and cold for days, and kids still need somewhere to go. These are the indoor plans we lean on: hands-on science centers, an aquarium, museums with things to climb into, warm water parks, trampoline halls, a puppet theater and a bowling alley. Here's what we checked, from the glowing sand table at Hevelianum to the shark slide at Aquapark Reda.
Hevelianum fills the barracks and casemates of a 19th-century fort on Góra Gradowa, the hill above the Main Town. Around the World crosses seven continents, With Energy! is hands-on energy experiments, and Puzzle is logic and math challenges. In Playing with History, kids try on old uniforms and fire a virtual cannon by gesture. Outside, 20 hectares of paths lead to a playground and lookouts over the old city.
A hands-on science center in Gdynia where kids test the exhibits instead of reading about them. Magnesto has 10 magnetism stations, including an electromagnetic accelerator and magnet races. Tajemnice głębin shows over 40 models of deep-sea creatures, from vampire squid to glowing jellyfish. Other halls cover the human body, water, health, physics and nature, and family workshops run alongside the exhibitions.
Gdynia Aquarium spreads more than 200 water species over eight halls on five floors, from Amazon tropics and a coral reef to the open Pacific, the Baltic and the cold North Atlantic. The Cold Seas hall, opened in 2024 below sea level in the basement, holds unusual jellyfish and crustaceans.
It is run by the National Marine Fisheries Research Institute, and a free web app guide explains each animal.
The Museum of the Second World War tells the story of the war through military equipment, documents and wartime objects. Seeing the whole main exhibition takes at least three hours.
Younger kids start at Podróż w czasie, a children's exhibition at the beginning of the route that follows a Warsaw family through the war and includes a prewar school classroom. It comes with the main exhibition ticket.
The European Solidarity Centre tells the story of the Solidarność movement from inside the former Gdańsk Shipyard. Seven rooms hold nearly 1,800 exhibits, among them the boards with the strikers' 21 demands, a shipyard overhead crane, an electric trolley and a police truck, alongside photos, films and interactive installations.
A rooftop observation deck looks out over the shipyard cranes, the canal and the church spires of the Old Town.
The Crane is a mid-15th-century port crane and city gate, the largest and oldest of its kind in Europe. Inside, a multimedia exhibition with walk-through sets recreates the 17th-century port: how ships found their way into harbor, the goods that arrived, old shipbuilding methods, and a historic tavern.
The visit ends at the crane's lifting mechanism, driven by wooden treadwheels 6 meters across.
More than 1,000 pieces of Baltic amber fill two floors of the Great Mill, a medieval mill built by the Teutonic Knights. The first floor shows how amber forms, with lumps holding creatures trapped more than 40 million years ago, among them the world's largest spider found in amber. The second covers amber craft, from a 330-year-old chess set to modern jewelry. Each floor has a kids' corner with puzzles.
The Naval Museum in Gdynia tells the story of the Polish Navy from 1918 to joining NATO, with a modern permanent exhibition, models of old sailing ships, and an armory of real naval guns, torpedoes and sea mines, many taken from Polish warships.
Next to it sits ORP Sokół, a Norwegian-built submarine that served until 2018. Kids can step inside the 47-meter hull that carried a crew of 21.
The Emigration Museum fills the historic Maritime Station (Dworzec Morski) in Gdynia's port. Its permanent exhibition follows the Sikora family to America, and kids can step into a transatlantic liner cabin, an aircraft interior and a Fiat 125p, touch and smell exhibits, and peek through spyholes in the walls.
The Little Traveller Room has books on travel and cultures and a model of the MS Batory liner.
Historia Wyspy Spichrzów (History of Granary Island) is a hands-on permanent exhibit by the Archaeological Museum on the second floor of the Błękitny Baranek granary. Kids race barrels down a timed track, haul on a pulley block, open barrels that play the sounds of a medieval port and study a granary model. A cinema shows an 11-minute cartoon about Johanek, a poor fiddler who takes work as a porter.
An interactive museum of arcade games from the 1980s and 1990s, with more than 100 machines, all of them playable. The collection runs from Space Invaders, Galaga and Donkey Kong to Tetris, Street Fighter II, Tekken, the Time Crisis II light-gun shooter, pinball tables and the Dancerush Stardom dance machine.
It suits kids who like buttons and noise, and parents who want the games they grew up with.
Loopy's World is a 3,000 m2 indoor play center built around a multi-level structure of mazes, tunnels and an obstacle course. Kids can try seven slides, including a steep adrenaline slide, a spiral slide and a four-lane family slide, plus five trampolines, a mini climbing wall, air cannons, a Ninja Park, a Spider Tower and a climbing tower.
Two toddler zones are set aside for 1 to 3-year-olds.
An indoor water park with leisure pools, a grotto with a waterfall and hydromassage loungers, plus a year-round outdoor pool reached by a lit channel. The Wild River is a 71-meter rapids run, the only one in Poland. Tube slides range from a gentle family pipe to the 12-meter-drop Turbo.
Toddlers get a warm baby pool with water cannons, spouting animals, geysers and small slides.
A water park whose headline ride, the Shark Slide, runs 60 meters through a tunnel in an aquarium of real sharks. Pirate Bay is a 30cm-deep pool with a pirate ship, seven slides and water cannons for toddlers.
Older kids head for the wave pool, the 315-meter lazy river, the wide family slide and the Ultra Speed vertical slide.
A 2,000 m² trampoline park with a large foam pit, sports trampolines, acrobatic tracks, an air track, trampolines with basketball hoops for dunking, a dodgeball arena and a gladiator zone. The 4.26 m Super Quad trampoline gives the highest bounces.
Trainers on the floor help kids learn flips safely, and there are changing rooms with showers, free lockers and a snack bar.
Miejski Teatr Miniatura is the Tricity's only puppet theater for children and teenagers, running for nearly 80 years. The program starts with shows made for babies and runs up to plays for teens, mixing classic children's books with new Polish and international stories.
Productions play on a main stage, a smaller chamber stage and a rehearsal room, and some performances come with audio description.
A branch of the Gdańsk city library on the second floor of the Galeria Manhattan mall in Wrzeszcz. The shelves hold children's and teen books, a big comics collection, audiobooks, music and films.
Beyond borrowing there is a reading room, free internet computers, game consoles, and instruments to play: a guitar, a drum pad and a digital piano. The branch also hosts the GDAK comics festival.
A 17-lane bowling center on the second floor of the Metropolia shopping mall, with bumpers and light balls so younger kids can knock down pins too. Five pool tables, two darts stations, sofas and a bar with a food menu fill the rest of the room.
Bowlers Journal International gave it first prize for the interior of a new bowling center in its 2020 design awards.
Baltic weather can stay gray, wet and cold for days, and kids still need somewhere to go. These are the indoor plans we lean on: hands-on science centers, an aquarium, museums with things to climb into, warm water parks, trampoline halls, a puppet theater and a bowling alley. Here's what we checked, from the glowing sand table at Hevelianum to the shark slide at Aquapark Reda.
Hevelianum fills the barracks and casemates of a 19th-century fort on Góra Gradowa, the hill above the Main Town. Around the World crosses seven continents, With Energy! is hands-on energy experiments, and Puzzle is logic and math challenges. In Playing with History, kids try on old uniforms and fire a virtual cannon by gesture. Outside, 20 hectares of paths lead to a playground and lookouts over the old city.
A hands-on science center in Gdynia where kids test the exhibits instead of reading about them. Magnesto has 10 magnetism stations, including an electromagnetic accelerator and magnet races. Tajemnice głębin shows over 40 models of deep-sea creatures, from vampire squid to glowing jellyfish. Other halls cover the human body, water, health, physics and nature, and family workshops run alongside the exhibitions.
Gdynia Aquarium spreads more than 200 water species over eight halls on five floors, from Amazon tropics and a coral reef to the open Pacific, the Baltic and the cold North Atlantic. The Cold Seas hall, opened in 2024 below sea level in the basement, holds unusual jellyfish and crustaceans.
It is run by the National Marine Fisheries Research Institute, and a free web app guide explains each animal.
The Museum of the Second World War tells the story of the war through military equipment, documents and wartime objects. Seeing the whole main exhibition takes at least three hours.
Younger kids start at Podróż w czasie, a children's exhibition at the beginning of the route that follows a Warsaw family through the war and includes a prewar school classroom. It comes with the main exhibition ticket.
The European Solidarity Centre tells the story of the Solidarność movement from inside the former Gdańsk Shipyard. Seven rooms hold nearly 1,800 exhibits, among them the boards with the strikers' 21 demands, a shipyard overhead crane, an electric trolley and a police truck, alongside photos, films and interactive installations.
A rooftop observation deck looks out over the shipyard cranes, the canal and the church spires of the Old Town.
The Crane is a mid-15th-century port crane and city gate, the largest and oldest of its kind in Europe. Inside, a multimedia exhibition with walk-through sets recreates the 17th-century port: how ships found their way into harbor, the goods that arrived, old shipbuilding methods, and a historic tavern.
The visit ends at the crane's lifting mechanism, driven by wooden treadwheels 6 meters across.
More than 1,000 pieces of Baltic amber fill two floors of the Great Mill, a medieval mill built by the Teutonic Knights. The first floor shows how amber forms, with lumps holding creatures trapped more than 40 million years ago, among them the world's largest spider found in amber. The second covers amber craft, from a 330-year-old chess set to modern jewelry. Each floor has a kids' corner with puzzles.
The Naval Museum in Gdynia tells the story of the Polish Navy from 1918 to joining NATO, with a modern permanent exhibition, models of old sailing ships, and an armory of real naval guns, torpedoes and sea mines, many taken from Polish warships.
Next to it sits ORP Sokół, a Norwegian-built submarine that served until 2018. Kids can step inside the 47-meter hull that carried a crew of 21.
The Emigration Museum fills the historic Maritime Station (Dworzec Morski) in Gdynia's port. Its permanent exhibition follows the Sikora family to America, and kids can step into a transatlantic liner cabin, an aircraft interior and a Fiat 125p, touch and smell exhibits, and peek through spyholes in the walls.
The Little Traveller Room has books on travel and cultures and a model of the MS Batory liner.
Historia Wyspy Spichrzów (History of Granary Island) is a hands-on permanent exhibit by the Archaeological Museum on the second floor of the Błękitny Baranek granary. Kids race barrels down a timed track, haul on a pulley block, open barrels that play the sounds of a medieval port and study a granary model. A cinema shows an 11-minute cartoon about Johanek, a poor fiddler who takes work as a porter.
An interactive museum of arcade games from the 1980s and 1990s, with more than 100 machines, all of them playable. The collection runs from Space Invaders, Galaga and Donkey Kong to Tetris, Street Fighter II, Tekken, the Time Crisis II light-gun shooter, pinball tables and the Dancerush Stardom dance machine.
It suits kids who like buttons and noise, and parents who want the games they grew up with.
Loopy's World is a 3,000 m2 indoor play center built around a multi-level structure of mazes, tunnels and an obstacle course. Kids can try seven slides, including a steep adrenaline slide, a spiral slide and a four-lane family slide, plus five trampolines, a mini climbing wall, air cannons, a Ninja Park, a Spider Tower and a climbing tower.
Two toddler zones are set aside for 1 to 3-year-olds.
An indoor water park with leisure pools, a grotto with a waterfall and hydromassage loungers, plus a year-round outdoor pool reached by a lit channel. The Wild River is a 71-meter rapids run, the only one in Poland. Tube slides range from a gentle family pipe to the 12-meter-drop Turbo.
Toddlers get a warm baby pool with water cannons, spouting animals, geysers and small slides.
A water park whose headline ride, the Shark Slide, runs 60 meters through a tunnel in an aquarium of real sharks. Pirate Bay is a 30cm-deep pool with a pirate ship, seven slides and water cannons for toddlers.
Older kids head for the wave pool, the 315-meter lazy river, the wide family slide and the Ultra Speed vertical slide.
A 2,000 m² trampoline park with a large foam pit, sports trampolines, acrobatic tracks, an air track, trampolines with basketball hoops for dunking, a dodgeball arena and a gladiator zone. The 4.26 m Super Quad trampoline gives the highest bounces.
Trainers on the floor help kids learn flips safely, and there are changing rooms with showers, free lockers and a snack bar.
Miejski Teatr Miniatura is the Tricity's only puppet theater for children and teenagers, running for nearly 80 years. The program starts with shows made for babies and runs up to plays for teens, mixing classic children's books with new Polish and international stories.
Productions play on a main stage, a smaller chamber stage and a rehearsal room, and some performances come with audio description.
A branch of the Gdańsk city library on the second floor of the Galeria Manhattan mall in Wrzeszcz. The shelves hold children's and teen books, a big comics collection, audiobooks, music and films.
Beyond borrowing there is a reading room, free internet computers, game consoles, and instruments to play: a guitar, a drum pad and a digital piano. The branch also hosts the GDAK comics festival.
A 17-lane bowling center on the second floor of the Metropolia shopping mall, with bumpers and light balls so younger kids can knock down pins too. Five pool tables, two darts stations, sofas and a bar with a food menu fill the rest of the room.
Bowlers Journal International gave it first prize for the interior of a new bowling center in its 2020 design awards.
