MAGNA-TILES Undersea Adventure 58-Piece Magnetic Construction Set, The Original Magnetic Building Brand

Dive into big-time imagination with Undersea Adventure, a 58-piece magnetic building set that turns any surface into a colorful 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.

• 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, coral 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.
• Made With Purpose: MAGNA-TILES sets are rooted in research on 21st century skills and are designed to deliver Meaningful Play experiences that are fun and engaging, experience-based, child-led, and truly developmental—helping kids build confidence as they build their world.
• 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, centerpiece set packed with creatures, characters, and interactive features.