Magna-Tiles - Undersea Adventure 58 Piece - Magnetic Ocean Building Set

The Magna-Tiles Undersea Adventure is a 58-piece magnetic building set that turns any table into a vibrant underwater world. Kids raise domed observation pods, link winding tunnels and drop sea creatures through splash-ready trapdoors, then send two diver figures on missions beneath the waves, building, exploring and rebuilding the scene every time they play. Thanks to the signature Magna-Tiles magnets, even tall, multi-level structures come together fast and stay standing in small hands, while ocean colours, wave graphics, sensory tiles and soft-touch coral give every build a tactile, hand-finished feel.

What's in the box (58 pieces)

Inside the box are 58 magnetic pieces: two divers with flippers, four sea animals (a dolphin, shark, sea turtle and an octopus with squishy soft-touch tentacles), an XL baseplate, quarter domes and arcs, slides, trapdoor tiles, sensory tiles, soft coral, arch windows and decorative ocean-themed tiles. It's the mix of characters, creatures, motion and texture that sets this ocean set apart — there's always another version of the underwater world to create, which is what keeps it in rotation week after week.

The play looks like pure imagination, but the learning runs underneath it. Stacking domes, routing slides, positioning animals and redesigning pathways quietly grow spatial reasoning, problem-solving and fine-motor skills, while the divers and sea creatures spark storytelling, role play and early curiosity about marine life, STEM that never announces itself. Aimed at ages 5+, it makes a standout gift for ocean lovers, animal fans and budding marine explorers ready for a big, centrepiece set. And because every piece is fully compatible with the wider Magna-Tiles range, it combines with sets like Dolphin Bay, Shark Dive, Coral Reef and Lighthouse Rescue to expand one undersea station into a whole coastline of reefs, bays and rescues.

Built to be played with hard, the magnets stay safely enclosed in Magna-Tiles' lattice design with secure fastening rivets, and every tile is made from food-grade, non-toxic MABS plastic — free from BPA, phthalates and latex — with kid-friendly magnets that snap together firmly yet separate easily. Designed for child-led, instruction-free play, it's built on Meaningful Play: fun, interactive, experience-based and genuinely developmental.

Suitable from 5 Years +

FAQ Section

What is the Magna-Tiles Undersea Adventure set? The Magna-Tiles Undersea Adventure is a 58-piece magnetic building set that lets children create a multi-level underwater world with observation domes, tunnels, trapdoors, slides, diver figures and sea creatures. It's designed for open-ended, story-driven STEM play for ages 5 and up.

How many pieces are in the Undersea Adventure set? The set includes 58 magnetic pieces: two diver figures with flippers, four sea creatures (dolphin, shark, sea turtle and a soft-touch octopus), an XL baseplate, quarter domes and quarter arcs, slides, trapdoor tiles, sensory tiles, soft coral pieces, arch windows and decorative ocean-themed tiles.

What age is the Magna-Tiles Undersea Adventure for? It's recommended for children aged 5 years and up. The larger, feature-packed design suits kids ready for a centrepiece set with creatures, characters and interactive elements.

Is Magna-Tiles Undersea Adventure compatible with other Magna-Tiles sets? Yes. All pieces are fully compatible with other Magna-Tiles sets, so children can combine it with sets like Dolphin Bay, Shark Dive, Coral Reef and Lighthouse Rescue, or with classic Magna-Tiles, to build bigger worlds.

Is the Magna-Tiles Undersea Adventure set safe for children? Yes. It uses Magna-Tiles' signature lattice design with secure fastening rivets that keep the magnets safely enclosed. The tiles are made from food-grade, non-toxic MABS plastic that is free from BPA, phthalates and latex.

What skills does the Undersea Adventure set help develop? Through child-led building, it supports spatial reasoning, problem-solving and fine-motor skills, while encouraging imaginative storytelling, role play and early curiosity about ocean life.

Does the set come with instructions? It's designed for instruction-free, child-led play. Children are free to build, explore and rebuild their own undersea world rather than follow a fixed set of steps.

Is the Magna-Tiles Undersea Adventure a good gift? Yes. It's well suited as a gift for ocean lovers, animal fans and budding marine explorers aged 5+ who are ready for a big, immersive building set with creatures, characters and interactive features.

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