1. Introduction
JEKCA building blocks offer a unique construction experience for creating detailed 3D animal sculptures. This manual provides comprehensive instructions for assembling your JEKCA Bernese Mountain Dog Mini 01S model, utilizing the patented interlocking technology for a sturdy, glue-free build. Please read all instructions carefully before beginning assembly.
2. Safety Information
- Small parts are included. Keep out of reach of small children to prevent choking hazards.
- Recommended for individuals aged 14 years and above.
3. What's in the Box
Your JEKCA Bernese Mountain Dog Mini 01S kit should contain the following items:
- Instruction Manual
- Building Bricks (various shapes and colors)
- Interlocking Pins
- Pin Driver Tool
- Quick Guide
4. Setup and Assembly Instructions
Follow the detailed step-by-step instructions provided in the included printed manual. The assembly process involves connecting individual bricks to form the Bernese Mountain Dog model.

Figure 4.1: The completed JEKCA Bernese Mountain Dog Mini 01S model.
4.1. Understanding the Interlocking System
Unlike traditional building blocks, JEKCA models utilize a patented interlocking pin system to ensure stability. After placing a brick in its designated position, you will use the provided pins and pin driver tool to secure it.

Figure 4.2: Illustration of the JEKCA interlocking pin system. Insert the pin and turn 90 degrees to secure the blocks.
- Place the Brick: Position the brick according to the step-by-step manual.
- Insert the Pin: Take an interlocking pin and insert it through the top stud of the newly placed brick, ensuring it passes through the corresponding hole in the brick below.
- Secure the Pin: Use the pin driver tool to turn the pin 90 degrees. This action locks the bricks together, creating a strong and stable connection.
Repeat these steps for each brick as indicated in your instruction manual. The interlocking system eliminates the need for glue, allowing for a robust and reconfigurable model.
5. Operating the Model
Once fully assembled, the JEKCA Bernese Mountain Dog Mini 01S model is designed as a static display piece. It is not intended for active play or rough handling. Place it on a stable surface where it can be admired.
6. Maintenance
To keep your JEKCA model in optimal condition:
- Cleaning: Gently wipe the model with a dry, soft cloth to remove dust. For more persistent dirt, a slightly damp cloth can be used, but ensure no water seeps into the block connections. Avoid using harsh chemicals or abrasive cleaning materials.
- Storage: If disassembling for storage, keep all bricks and pins organized to prevent loss. Store in a cool, dry place away from direct sunlight.
7. Troubleshooting
- Blocks not staying together: Ensure that the interlocking pins are correctly inserted and turned 90 degrees as instructed in Section 4.1. Each pin must securely engage the bricks to maintain stability.
- Missing pieces: If you discover any pieces are missing from your kit upon opening, please contact JEKCA customer support immediately. Provide your model number (ST19DM02) and a detailed description of the missing parts.
- Difficulty with assembly: Refer back to the step-by-step instruction manual provided in your kit. Ensure you are following each step precisely.
8. Specifications

Figure 8.1: Approximate dimensions of the assembled model.
| Product Dimensions | 5.39 x 2.95 x 4.92 inches (13.7 x 7.5 x 12.5 cm) |
| Item Weight | 13.7 ounces |
| Model Number | ST19DM02 |
| Recommended Age | 14 years and up |
| Manufacturer | JEKCA Limited |
9. Warranty and Support
This manual does not contain explicit warranty information. For any warranty inquiries, product support, or assistance with missing parts, please contact JEKCA Limited directly through their official website or customer service channels. Please have your model number (ST19DM02) ready when contacting support.