The Whitney Brothers 680-Piece Full Unit Block Set is the largest set in the Whitney Brothers unit block range - 680 hardwood blocks across 29 different shapes, built for classrooms, childcare centres, libraries, and early childhood institutions across North America where large-scale block play is a core part of the learning environment. At this scale, blocks are not just a toy. They become the raw material of collaborative architecture, imaginative city-building, shared engineering experiments, and the kind of sustained, open-ended play that develops cognition, communication, and physical confidence in ways few other materials can match.

The blocks are hardwood with a smooth natural finish and rounded edges throughout. Very slight variations in block size are a natural characteristic of the material and are noted openly. The 29 shapes - including rectangles, squares, triangles, arches, and more - provide the full vocabulary of unit block construction, giving children and educators the material range to build structures of genuine complexity.

GREENGUARD Gold Certified. 

Key Features of the Whitney Brothers 680-Piece Full Unit Block Set

• 680 Total Blocks Across 29 Different Shapes - The largest set in the Whitney Brothers unit block range provides the full breadth of shapes needed for open-ended, complex construction play in classroom and institutional environments.
• Hardwood Construction - Smooth Natural Finish - Blocks are constructed from hardwood with a smooth natural finish, providing the weight, durability, and tactile quality that supports both independent and collaborative construction over many years of use.
• Rounded Edges Throughout - Safe for All Users - All edges are rounded for safety, making these blocks safe for children of all ages and abilities in any early learning or therapeutic environment.
• Very Slight Size Variations - Natural Wood Characteristic - Slight variations in block size are a natural characteristic of the wood material and are noted openly. They do not affect structural stability for standard building activities.
• 29 Shapes Including Rectangles, Squares, Triangles and Arches - The full range of unit block shapes provides the material vocabulary for everything from simple stacking to complex structural design and imaginative construction play.
• Blocks Cart Not Included - The set does not include a storage cart. A compatible Whitney Brothers block cart is available separately.
• GREENGUARD Gold Certified - Meets the most stringent indoor air quality certification for chemical emissions, appropriate for classrooms, childcare centres, and Early Learning environments.
• Ships in 8 Boxes - 369 lbs Total - Due to the size and weight of this set, it ships in 8 boxes with a combined weight of 369 lbs.

Skills and Benefits of the Whitney Brothers 680-Piece Full Unit Block Set

• Tactile Skills and Sensory Exploration - Handling, gripping, and feeling 29 different shapes in natural hardwood develops tactile discrimination, object recognition by touch, and the sense of weight, texture, and form that is central to sensory exploration and integration.
• Gross Motor Skills - Grabbing, gripping, lifting, placing, and stacking blocks of various sizes and weights develops gross motor coordination, upper body strength, and purposeful physical control.
• Fine Motor Skills and Hand-Eye Coordination - Precise placement of blocks, balancing structures, and fitting shapes together develops fine motor coordination and hand-eye integration in a physically rewarding, self-directed context.
• Creativity and Imaginative Play - The open-ended nature of 680 blocks in 29 shapes supports unlimited imaginative construction - castles, cities, bridges, ramps, enclosures - with no prescribed outcome and no single correct way to play.
• Cognitive Development and Logical Thinking - Planning a building, solving structural problems, sequencing block placement, and predicting what will happen if one block is moved develops logical thinking, spatial reasoning, and executive function.
• Social Interaction and Collaborative Play - With 680 blocks, multiple children can build together simultaneously, creating natural opportunities for communication, negotiation, shared decision-making, and cooperative construction.
• Mathematical and Scientific Concepts - Comparing block sizes, understanding symmetry, exploring balance and gravity, and discovering that two small blocks equal one larger one introduces early mathematical and scientific reasoning in a hands-on, concrete format.

Ideal For

• Early childhood classrooms and preschools building a complete unit block play environment for group construction and open-ended learning
• Childcare centres and Head Start facilities across Canada and the US where large-scale block play is a daily part of the program
• Libraries, museums, and public play spaces requiring durable, long-life hardwood blocks for sustained high-traffic use
• Schools and educational institutions sourcing Whitney Brothers materials for early learning and sensory development programs
• OTs and educators using block play for tactile, gross motor, fine motor, and cognitive development activities

GreenGuard™ Gold certified.  

• Weight: 369 lbs.
• Shapes: 29 different shapes (including rectangles, squares, triangles, arches)
• Material: Hardwood (rubberwood)
• Arrives In: 8 Boxes