1. Product Overview
The PUPUKOU FD-312 Micro Diamond Building Blocks set contains 200 pieces of 8mm x 7mm pixel art puzzle blocks, available in 40 vibrant colors. These micro building blocks are designed for DIY 3D creations, fostering creativity and fine motor skills in users aged 14 and above. Made from safe, eco-friendly ABS/PP material, these blocks offer precise sizing, firm connections, and a smooth, durable finish for stable and detailed models.

Figure 1: Assortment of 8mm micro building blocks (200 pieces per pack).
Key Features:
- Precise Size & Firm Connection: 8mm golden proportion with ultra-tight tolerance for smooth assembly and stable models. Fully compatible with mainstream building block systems.
- Safe & Eco-friendly Material: Food-grade ABS/PP raw material, non-toxic, odorless, drop-resistant, and tough. Certified by EN71, ASTM, and 3C safety standards. Features a super smooth, burr-free surface.
- Vibrant Colors & Texture: High saturation and color fidelity using food-grade color masterbatch, offering bright, even, and non-bleeding colors. Available in 40 colors with a matte/semi-matte finish.
- Durable Structure: Integrated injection molding for a seamless, sturdy, and impact-proof structure. Optimized buckle design ensures tight connections.
- Creativity & Educational Benefits: Ideal for miniature creations, detailed models, micro scenes, and art ornaments. Enhances hand-eye coordination, spatial thinking, and concentration.
Video 1: Product demonstration showing block dimensions, connection methods, and example creations.
2. Safety Information
WARNING: Read all instructions before use. Failure to follow these instructions may result in damage to the product or personal injury.
- Choking Hazard: Contains small beads. Not suitable for children under 36 months.
- Keep plastic packaging bags away from children to avoid suffocation risk.
- For DIY craft use only. Do not swallow or put into mouth and nose.
- Keep away from children unless supervised by an adult.
- Do not use this product for purposes other than its intended use.
- Inspect the product before each use; do not use if damaged.
- Ironing Safety: Ironing must be operated by adults. Do not let children touch the hot iron or hot finished products to avoid scalding. Keep the iron and its cord out of reach of children under 3 years old.
3. Setup and Assembly Instructions
Follow these steps to create your pixel art designs:
Step 1: Prepare Tools
- Place the template board flat on a stable surface.
- Put the matching paper template on the board and fix it well.
- Prepare your micro building blocks, tweezers, ironing paper, and a household low-temperature iron.
Step 2: Arrange Beads
- Use tweezers to pick up individual beads.
- Fill the pattern grid one by one according to your design drawing.
- Ensure the entire pattern is filled tightly without any gaps.

Figure 2: Blocks can be connected on all sides.

Figure 3: Blocks can be stacked vertically.
Step 3: Cover Ironing Paper
- Lay one piece of special ironing paper evenly and completely over the finished bead pattern.
- Ensure the paper does not shift the beads.
Step 4: Iron Gently
- Adjust the iron to low temperature mode (no steam, turn off steam function).
- Iron back and forth slowly and evenly on the paper until the beads melt and stick together firmly.
- Important: Please use low temperature and no steam mode. High temperature will cause bead deformation and damage.
Step 5: Cool & Demold
- Leave the finished work flat and allow it to cool down completely and naturally.
- Once fully hardened, gently peel off the ironing paper.
- Carefully remove your finished craft from the template board.
4. Maintenance
- Cleaning: To clean the blocks or finished creations, gently wipe with a damp cloth. Avoid harsh chemicals or abrasive materials.
- Storage: Store unused blocks in a dry, cool place away from direct sunlight to prevent fading and maintain material integrity. Keep them in their original packaging or a sealed container to prevent loss.
- Durability: The blocks are designed to be durable and anti-aging, maintaining performance after thousands of reassemblies.
5. Troubleshooting
- Beads Not Sticking After Ironing:
- Ensure the iron is set to a low temperature and has no steam.
- Apply gentle, even pressure across the ironing paper for a sufficient duration.
- Verify the ironing paper completely covers the beads.
- Beads Deforming or Melting Too Much:
- The iron may be too hot. Reduce the temperature setting.
- Apply less pressure or iron for a shorter duration.
- Finished Pattern Falls Apart After Demolding:
- Ensure the creation has cooled down completely and naturally before attempting to peel off the paper or remove it from the board. Premature demolding can cause breakage.
- Missing or Damaged Pieces:
- If you find any missing or damaged blocks upon opening the package, please contact customer support for assistance.
6. Specifications
| Attribute | Detail |
| Brand Name | PUPUKOU |
| Model Number | FD-312 |
| Block Size | Micro building block (approx. 8mm x 7mm) |
| Material | Food-grade ABS/PP |
| Quantity | 200 pieces per pack |
| Colors Available | 40 colors |
| Recommended Age | 14+ years (Not suitable for children under 36 months due to small parts) |
| Gender | Unisex |
| Certifications | CE, EN71, ASTM, 3C safety standards |
| Is Electric | No battery required |
| Package Dimensions (approx.) | 13 cm (L) x 13 cm (W) x 1 cm (H) |
| Package Weight (approx.) | 0.05 kg |
| Origin | Mainland China |

Figure 4: Available color palette for PUPUKOU Micro Diamond Building Blocks.
7. User Tips
- Color Sorting: For complex designs, sort your blocks by color before you begin assembly to save time and improve accuracy.
- Stable Workspace: Always work on a flat, stable, and well-lit surface to prevent blocks from scattering and to ensure precise placement.
- Patience is Key: Micro building blocks require precision and patience. Take your time with each placement for the best results.
- Verify Dimensions: While advertised as 8mm, actual dimensions are approximately 8mm x 7mm. If precise square dimensions are critical for your project, please account for this.
8. Warranty and Support
For any product inquiries, support, or warranty claims, please contact the manufacturer or authorized representative directly.
Manufacturer Information:
- Company: Yiwu Cangtou E-commerce Co., Ltd.
- Address: Room 101, No. 1-1, Building 70, Jiangnan Fourth Community, Jiangdong Street, Yiwu City, Jinhua City, Zhejiang Province, China
- Email: 1561978262@qq.com
- Store URL: https://www.aliexpress.com/store/1166194/18857970714
EU Authorized Representative:
- Company: Humiss International B.V.
- Address: Joop Geesinkweg 701, Amsterdam-Duivendrecht, the Netherlands
- Email: business@humiss.com
- Phone: +31 (0)-20 369 8116
Please retain your proof of purchase for any warranty-related inquiries.