Introduction
Welcome to the JEKCA building experience! This manual provides detailed instructions for assembling your JEKCA Cat 12S-M01 Calico Cat model. JEKCA building blocks utilize a unique interlocking brick-through system to create sturdy and detailed sculptures. Please read through all instructions carefully before beginning assembly.
This product is recommended for individuals aged 14 years and above.
Safety Information
Warning: This product contains small parts. It is not suitable for children under 14 years of age due to choking hazards. Adult supervision is recommended for younger builders within the recommended age range.
What's in the Box
Before you begin, please verify that all components are present in your package:
- Bricks (over 1460 pieces)
- Instruction Manual
- Pin Driver
- Pins
- Quick Guide

This image illustrates the various components included in your JEKCA kit, along with a visual guide to the interlocking brick assembly method.
Setup
Follow these steps to prepare for assembly:
- Clear Your Workspace: Ensure you have a clean, flat, and well-lit area to work on. This will help prevent losing small pieces and provide ample space for sorting.
- Unpack Components: Carefully open the packaging and remove all bags of bricks, the instruction manual, pin driver, and pins.
- Sort Bricks (Optional but Recommended): For a smoother building process, consider sorting the bricks by color and/or size. This can significantly reduce search time during assembly.
- Review Instructions: Familiarize yourself with the entire instruction manual and quick guide before starting. Pay close attention to the diagrams and the interlocking system explanation.
Assembly Instructions
Your JEKCA model is assembled using a patented interlocking brick-through system. This system ensures the finished model is sturdy and durable without the need for glue. The included instruction manual provides step-by-step diagrams for building your Calico Cat.
Understanding the Interlocking System:
- Each brick has holes designed to accommodate pins.
- To connect two bricks, align them as shown in the manual.
- Insert a pin through the aligned holes using the provided pin driver.
- Turn the pin 90 degrees to lock the bricks securely in place.

This diagram demonstrates the core principle of the JEKCA interlocking system, emphasizing how bricks are joined using pins for a strong and stable structure.

A visual representation of the patented interlocking brick-through technology, showcasing the secure connection method.
General Assembly Tips:
- Follow the steps in your included manual sequentially. Do not skip steps.
- Ensure each pin is fully inserted and turned 90 degrees for maximum stability.
- If a piece does not fit easily, double-check the instruction diagram. Do not force pieces together.
- Take breaks if you feel fatigued or frustrated. A fresh perspective can often help resolve difficulties.
Product Dimensions:

The completed JEKCA Calico Cat model, showing its approximate dimensions for reference.
Assembly Demonstration Video:
This video provides a visual demonstration of the JEKCA building block assembly process, showcasing how to connect bricks and create models.
Maintenance
To keep your JEKCA Calico Cat model in excellent condition:
- Cleaning: Gently wipe the model with a soft, dry cloth to remove dust. For more stubborn dirt, a slightly damp cloth can be used, but avoid excessive moisture.
- Storage: Store your completed model in a stable location away from direct sunlight and extreme temperatures to prevent discoloration or material degradation.
- Handling: While sturdy, avoid dropping or applying excessive force to the model to prevent bricks from detaching.
Troubleshooting
If you encounter difficulties during assembly, consider the following:
- Confusing Instructions: If a particular step seems unclear, re-examine the diagram carefully. Sometimes, rotating the manual or the model can provide a different perspective. Ensure you are using the correct brick type and color for the current step.
- Bricks Not Locking Securely: Ensure the pin is fully inserted into the aligned holes of both bricks before turning it 90 degrees. The pin driver should be used to apply even pressure. If a pin is bent, replace it with a new one.
- Missing Pieces: Double-check your workspace and packaging. If you believe a piece is genuinely missing, please contact JEKCA customer support.
- Disassembly: If you need to disassemble a section, carefully use the pin driver to turn the pins back 90 degrees and gently pull the bricks apart. Avoid excessive force to prevent damage to the bricks or pins.
Specifications
| Feature | Detail |
|---|---|
| Brand Name | JEKCA |
| Model Name | Cat 12S-M01 |
| Model Number | ST19CA12-M01 |
| Item Type Name | Plastic Building Blocks |
| Color | Calico |
| Number of Pieces | 1460 |
| Item Dimensions (L x W x H) | 47.5 x 10.6 x 27.9 cm (18.7 x 4.17 x 10.98 inches) |
| Item Weight | 1.14 Kilograms |
| Material Type | Plastic |
| Age Range Description | Recommended for 14 or above |
| Assembly Required | Yes |
| Special Feature | Sturdy without glue (Interlocking Brick-through System) |
Support
For further assistance, inquiries about missing parts, or general support, please visit the official JEKCA store or contact their customer service.
Official JEKCA Store: JEKCA Store on Amazon