Introduction
This instruction manual provides comprehensive guidance for assembling and understanding the LEGO Creator Fish Tank 31122 3-in-1 Building Set. This versatile set allows you to construct three distinct models: a vibrant Fish Tank, a detailed Treasure Chest, or an artistic Art Easel. Follow these instructions carefully to ensure a successful and enjoyable building experience.
Setup and Assembly
The LEGO Creator Fish Tank 31122 set includes detailed, step-by-step pictorial instructions for each of the three possible builds. It is recommended to sort your LEGO bricks by color and size before beginning assembly to streamline the building process.
1. The Fish Tank Build
The primary model for this set is a colorful fish tank featuring five different fish, a submarine, and various coral and aquatic plant elements. This build is designed to be a static display piece, showcasing an underwater scene.

This image displays the completed Fish Tank model. Notice the diverse fish designs, including a yellow fish, a clownfish, and other colorful aquatic creatures, all set within a clear brick frame simulating a tank. Various coral pieces and green aquatic plants add to the underwater environment.

From this angle, the intricate placement of each fish and coral piece is visible, creating a dynamic and engaging scene within the tank. The transparent bricks give the illusion of water, enhancing the display quality.
2. The Treasure Chest Build
Alternatively, the same bricks can be reassembled to create a detailed treasure chest. This model typically includes a chest that can open and close, along with accessories like a sword, a crab, and a bird.

This image shows the Treasure Chest build, featuring a black chest adorned with coral-like elements. A blue and white sword is positioned next to it, and a small orange crab with large eyes sits in the foreground. A bird with light blue wings is also part of this scene.

Here, the Treasure Chest is shown with its lid slightly ajar, revealing some internal details. The crab and bird are also visible, offering a different perspective on the alternative build.
3. The Art Easel Build
The third option is an Art Easel, which can display a colorful brick-built painting, often depicting a parrot or other vibrant imagery.

This image presents the Art Easel model, constructed with black and blue bricks, holding a canvas made of tan bricks. The canvas features a colorful mosaic that resembles a parrot, surrounded by green plant elements.
Building Tips:
- Always refer to the included instruction booklets for precise steps.
- Ensure all bricks are firmly pressed together to prevent models from falling apart.
- If you encounter difficulty, retrace your steps or consult the digital instructions available on the official LEGO website.
Video: An overview of the LEGO Creator Fish Tank 31122 set, demonstrating the assembled model and its features. This video is provided by Zany Kids Family Favorites.
Video: A review showcasing the LEGO Creator Fish Tank, highlighting its design and appeal. This video is provided by TTPM.
Operating and Play Features
The LEGO Creator Fish Tank 31122 set is designed for creative play and display. Each of the three models offers unique interactive elements:
- Fish Tank: The individual fish and coral pieces can be rearranged within the tank to create different underwater scenes. The fish are often designed with small connection points allowing for dynamic positioning.
- Treasure Chest: The lid of the treasure chest can be opened and closed, allowing for small LEGO treasures or other items to be stored inside. The crab and bird figures are posable for imaginative play.
- Art Easel: The easel can hold the brick-built painting, and the painting itself can be removed or replaced with other flat LEGO creations.

This image illustrates the engagement the Fish Tank model provides, showing a child admiring the colorful display. The clear sides of the tank allow for full visibility of the internal elements.

Here, a child is shown holding the sword from the Treasure Chest build, with the crab figure nearby. This demonstrates the interactive elements and play potential of the alternative models.
Maintenance
To keep your LEGO Creator models in optimal condition, follow these simple maintenance guidelines:
- Cleaning: Dust regularly with a soft, dry cloth or a soft-bristled brush. For deeper cleaning, gently wash individual bricks with mild soap and lukewarm water (not hot water) and rinse thoroughly. Air dry completely before reassembly or storage. Do not use harsh chemicals or abrasive materials.
- Storage: Store your LEGO models and spare bricks in a cool, dry place away from direct sunlight to prevent discoloration and material degradation. Keep them in a container to prevent loss of small pieces.
- Handling: Handle models carefully, especially when moving them, to avoid accidental disassembly.
Troubleshooting
If you encounter any issues during assembly or with your completed model, consider the following:
- Missing Pieces: If you find a piece missing from your new set, please visit the official LEGO Customer Service website to request replacement parts.
- Difficulty Assembling: Double-check the instruction steps. Sometimes a small detail can be overlooked. Ensure you are using the correct bricks for each step. Digital instructions with 3D views are often available online for easier visualization.
- Model Instability: Ensure all bricks are fully connected and pressed down firmly. Loose connections can lead to a wobbly or unstable model.
- Discoloration: Exposure to direct sunlight or extreme temperatures can cause LEGO bricks to discolor over time. Store models away from windows and heat sources.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 31122 |
| Brand | LEGO |
| Series | Creator 3-in-1 |
| Number of Pieces | 352 |
| Recommended Age | 8 years and up |
| Product Dimensions (Box) | 13.94 x 7.56 x 2.24 inches |
| Item Weight | 1.28 pounds |
Warranty and Support
LEGO products are manufactured to high-quality standards. For information regarding product warranty, missing parts, or general customer support, please visit the official LEGO Customer Service website.
Official LEGO Customer Service: www.lego.com/service
Here you can find FAQs, replacement parts ordering, and contact information for further assistance.





