Magna-Tiles® Undersea Adventure 58-Piece Set

Dive into big-time imagination with Undersea Adventure, a 58-piece magnetic building set that turns any surface into a colourful underwater world. Kids can build domed observation pods, pop open trapdoor tiles, and send divers splashing into the scene alongside a dolphin, shark, sea turtle, and octopus.

With new sensory tiles, soft coral and octopus tentacle pieces, and ocean wave graphics, every build feels like a brand-new deep-sea mission to explore. 

Drop into deep-sea play with a 58-piece set that turns any surface into an underwater world.

Build an ocean floor, add a fearless diver, and bring a playful shark into the scene for thrilling, kid-led stories.

Mix, match, and rebuild with other sets to keep the adventures going long after the first dive.

What’s Included: 58 magnetic pieces, including an XL baseplate, quarter domes and quarter arcs for building pod-like structures, teal straight and curved slides, trapdoor tiles, new sensory tiles, soft coral and octopus tentacle pieces, arch windows, decorative ocean tiles, two diver figures with flippers, and four sea creatures—a dolphin, shark, sea turtle, and octopus.  

What Makes It Unique: A large, feature-packed ocean set that combines multi-level building with character and creature play, sensory tiles, and dynamic slide and trapdoor elements—giving kids a complete underwater world to build, explore, and rebuild in countless ways. 

Developmental: Encourages imaginative storytelling, role play, and early interest in ocean life as kids create their own undersea missions and habitats. Supports spatial reasoning, problem-solving, and fine motor skills while they stack domes, connect slides, position animals, and experiment with different layouts and pathways. 

Great for Gifting: Perfect for animal lovers, ocean fans, and budding marine explorers ages 5+ who are ready for a big, centrepiece set packed with creatures, characters, and interactive features. 

View our entire Magna-Tiles® collection here!

Recommended for ages 3+

Makes a great travel toy! To view all our travel toys, please click here.

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SKU: 262058UA