The TUKI BIG Magnetic Blocks Builder 26 builds on the entry-point Builder 12 in two ways: more blocks and more shapes. The Builder 12 contains 12 blocks across cubes, beams, and L-shapes - the three foundational shapes that establish how BIG blocks connect and stack. The Builder 26 contains 26 blocks across 7 Signature TUKI shapes, adding the triangle and additional shape variants that introduce angled connections, pitched roof forms, and diagonal structural possibilities that the three-shape starter set cannot achieve.

That geometric expansion matters. A set with only cubes, beams, and L-shapes produces right-angle structures - towers, walls, bridges, and rectilinear forms. Add a triangle and the range opens to gabled roofs, diagonal bracing, pyramids, and the angular variety that makes a house look like a house rather than a rectangular box. For a child building at floor scale with 10cm large-format blocks, that difference is felt immediately - the builds look and feel architecturally richer, the structural problem-solving becomes more complex, and the sustained attention required to work with seven distinct shapes rather than three produces a deeper engagement with the construction process.

Each block is made from closed-cell EVA foam with a waterproof rotating neodymium magnet capsule. Every face of every block attracts every other face in any orientation - no wrong connections, no repelling faces. The blocks are EN71-certified, BPA-free, non-toxic, disinfectable, and float. At 26 blocks in a storage bag the set is recommended for 1-2 children and available across North America. 

Key Features of the TUKI BIG Magnetic Blocks Set - Builder 26

• 26 Large 10cm Magnetic Foam Blocks in 7 Signature TUKI Shapes - Twenty-six blocks across 7 distinct shape types including cubes, beams, L-shapes, and triangles - more geometric variety than the Builder 12's three shapes, enabling angular construction and architectural complexity that right-angle-only sets cannot produce
• Triangle Shapes Included - Angled Construction and Roof Forms - The triangle shapes in the Builder 26 introduce diagonal connections and angled structural possibilities: gabled roofs, pyramidal forms, diagonal bracing, and the non-rectilinear variety that makes large-format floor construction feel genuinely architectural rather than simply stacked; a structural capability the Builder 12 does not have
• 10cm x 10cm x 10cm Large-Format BIG Blocks - Each block is a full 10cm cube - twice the linear dimension of the Regular range and eight times the volume per block; these are floor-scale, both-hands, whole-body building blocks that develop gross motor planning, bilateral coordination, and proprioceptive body awareness in ways tabletop construction cannot
• Rotating Neodymium Magnet Capsules - Full-Angle Connectivity - Each block contains a neodymium magnet in a waterproof rotating capsule providing full-angle connectivity; every face of every block attracts every other face in any orientation, with no repelling faces and no failed connections - every placement succeeds
• Four Colours - Turquoise, Grey, Yellow and Pink - Twenty-six blocks distributed roughly equally across four colours supports colour-based sorting, pattern-making, and deliberate colour-led building decisions; with 26 blocks at this size, single-colour structures at meaningful scale are achievable
• Closed-Cell EVA Foam - Waterproof, Disinfectable and Floating - Made from closed-cell EVA foam that does not absorb water; blocks are completely waterproof, wipe clean or disinfect in seconds, and float - suitable for water sensory play and institutional settings where hygiene between uses is required
• EN71-Certified, BPA-Free and Non-Toxic - Certified to EN71-1, EN71-2, and EN71-3 European toy safety standards; BPA-free and non-toxic; independently safety-tested for heavy metal migration, non-flammability, and mechanical safety; appropriate for kindergartens, therapy rooms, and all regulated early years settings
• Compatible with All TUKI BIG BUILDER and SMART Sets - Every block is fully compatible with all other TUKI BIG products; a Builder 26 collection can be combined with a Builder 12, expanded with any SMART set, or used alongside other Builder sets to build a collection that scales from 26 to 280 elements without compatibility concerns
• Storage Bag Included - Recommended for 1-2 Children - The set includes a storage bag and is designed for individual or paired use; enough blocks for one child to build a structurally ambitious floor construction, or for two children to build complementary structures and combine them
• Poland's Toy of the Year 2023 - Made in Poland - Awarded Poland's Toy of the Year 2023; manufactured in Poland to EN71 European safety standards

Why Seven Shapes Changes the Construction Experience

The relationship between shape variety and construction depth in block play is well established in early childhood research: the more distinct shapes available, the more complex the structural problem-solving required, the richer the spatial reasoning development, and the longer the sustained engagement with the building task. Two blocks of the same shape connect in one meaningful configuration. Two blocks of different shapes require the builder to understand how they relate geometrically - which face connects to which, what angle results, how that angle propagates through the structure.

The triangle is particularly significant in this context because it is the only inherently rigid geometric form. A rectangle can be deformed by diagonal pressure; a triangle cannot. Understanding that intuitively - through the experience of building with triangular pieces at a scale where the rigidity is physically evident - is one of the earliest encounters with structural engineering principles that block play can provide. Children who have built with triangles at floor scale understand something physically about how roofs and bridges work that children who have only built with cubes and rectangles do not.

Skills and Developmental Outcomes

• Spatial Reasoning and Geometric Understanding - Building with 7 distinct shapes including triangles develops spatial reasoning, shape recognition, and early geometric intuition at a depth that single-shape or three-shape sets cannot approach; the triangle in particular introduces angular structural logic that extends construction thinking beyond right angles
• Gross Motor Planning and Bilateral Coordination - Picking up, carrying, and placing 10cm large-format foam blocks develops bilateral coordination, motor planning, and whole-body spatial awareness; the gross motor demands of floor building at this scale are distinct from tabletop construction
• Early Engineering and Structural Problem-Solving - Combining cubes, beams, L-shapes, and triangles to create stable, architecturally coherent floor structures develops balance, span, load distribution, and the basic structural engineering principles that physical construction at meaningful scale uniquely teaches
• Creative Expression and Extended Imaginative Play - Seven shape types with 26 blocks at floor scale supports the richest open-ended imaginative construction this range provides for individual use; builds are complex enough and varied enough to sustain extended play sessions and narrative projection
• Fine Motor Precision Within Large-Format Play - Precise block placement, particularly connecting angled triangle faces to other shapes, develops the hand-eye coordination and spatial orientation judgment that bridges gross and fine motor development
• Collaborative Play and Social Communication - Recommended for 1-2 children; two children building a shared structure with 7 distinct shapes must negotiate shape selection, structural decisions, and spatial organisation in ways that develop social communication and joint problem-solving

Ideal for

• Children at home wanting a floor-scale magnetic construction set that builds more complex structures than the entry-level Builder 12
• Occupational therapy clinics and physiotherapy rooms using large-format floor building for gross motor, spatial reasoning, and bilateral coordination sessions
• Kindergartens and early years settings equipping construction zones with EN71-certified, wipeable large-format magnetic foam blocks
• Sensory rooms and multi-sensory environments incorporating floor-scale building as a whole-body physical and cognitive activity
• Existing Builder 12 owners looking to expand their collection with additional shapes and greater structural complexity
• Families wanting a construction set that grows with the child - complex enough for sustained engagement from preschool through school age

• Single block: 10×10×10 cm
• Set/packaging: 50 x 30 x 30 cm
• Weight: 6kg
• Colours: Turquoise, Grey, Yellow, Pink (approx equal distribution)
• Magnet type: Neodymium magnets in waterproof rotating capsules
• Material: Closed-cell EVA foam, BPA-free, non-toxic