Product Details

Magnetic Building Blocks combine the classic fun of large particle bricks with embedded neodymium magnets, enabling intuitive 360° connectivity for STEAM education and creative construction. As a 30-year expert in large particle blocks, our factory controls the whole industrial chain from high-purity ABS raw materials (≥95% purity, no recycled content) to final assembly. Certified under IATF16949, ISO9001, EN71, REACH, RoHS, ASTM, CPSIA, and CA65, these magnetic building blocks are engineered for safe export to North America and Europe. With precision tooling and ±0.01mm tolerance, we support custom sizes from 0.2mm to 150mm, making each set a reliable choice for B2B buyers in the educational toy, preschool chain, and gift sectors.

Technical Specifications

Parameter	Details
Product Name	Magnetic Building Blocks (Large Particle Magnetic Blocks)
Material	High-purity ABS (virgin grade, ≥95% purity) + NdFeB rare earth magnets
Dimensions	Standard large particle: 31.5mm base unit; custom from 20mm to 150mm available
Magnetic Strength	Pull force ≥2.5 kg per magnetic joint, strong and stable for complex structures
Coating	Nickel-copper-nickel (NiCuNi) on magnets; ABS surface with anti-scratch finish
Certifications	EN71, REACH, RoHS, ASTM F963, CPSIA, CHCC, CPSC, CA65, IATF16949, ISO9001
Operating Temperature	-20°C to 80°C (magnetic performance remains stable in indoor/outdoor use)
Tolerance	±0.01 mm for magnetic cavity insertion, ensuring seamless assembly

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Key Features & Applications

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Seamless magnetic connection – built-in NdFeB magnets allow 360° rotation, no polarity mismatch
Large particle size (31.5mm base) ensures safety for toddlers and easy grip for early learners
Compatible with standard large-particle building brick systems, expanding play value
Widely used in kindergartens, after‑school STEAM programs, toy rental services, and retail gift packs
Fully customizable colors, logos, and packaging for OEM/ODM projects

Advantages

30 years of large-particle block expertise – integrated R&D, molding, and assembly under one roof
Full supply chain control: from high-purity ABS raw material (virgin, ≥95%) to finished magnetic building blocks, no subcontractors
Precision electroplating for magnets – 5-layer NiCuNi process ensures corrosion resistance and long‑lasting magnetic force
Stringent quality: each batch passes pull‑force tests, drop tests, and salt spray tests to meet global toy standards
Cost‑effective for bulk orders: 18% lower than market average due to in‑house raw material sourcing and automated production lines

Packaging & Shipping

Custom-designed retail boxes with inner anti-collision foam, or economical kraft paper master cartons for bulk export. Each magnetic building blocks set is individually polybagged to prevent scratching. We support sea freight, air freight, and door‑to‑door courier services; full customs documentation and safety test reports are provided. For large‑volume orders, we offer mixed pallet packing with reinforced corner protectors.

After-Sales Service

2‑year warranty against manufacturing defects; 72‑hour response for any quality concerns. We provide free replacement for missing or damaged parts within the first shipment. For B2B partners, we also offer custom SKU management and reordering support with consistent color matching across batches.

FAQ

Q: What is the MOQ for custom magnetic building blocks?

A: MOQ is 500 sets for standard color combinations; custom logo and packaging require 2000 sets. Samples are available within 7 working days.

Q: Are these magnetic building blocks safe for 3‑year‑olds?

A: Yes, all our magnetic building blocks are designed with large particle size (over 31.5mm) and fully encapsulated magnets to prevent swallowing. They meet EN71‑1 and ASTM F963 safety requirements.

Q: Can you produce custom shapes beyond standard bricks?

A: Absolutely. With ±0.01mm precision tooling, we can create any custom geometry, magnetic poles arrangement, and even integrate electronic components upon request.

Production Process

High-purity ABS pellet drying & injection molding (virgin material, no recycled content)
Precision mold machining with CNC centers (tolerance ±0.01mm)
NdFeB magnet manufacturing and NiCuNi electroplating
Magnetic insertion by automated press-fit machines
Ultrasonic welding for permanent sealing (no glue, no chemical residue)
100% pull‑force test & surface scratch test
Color sorting and sterile packaging in clean workshop
Final random sampling per ISO2859‑1 before shipment