1. Product Overview
The LEGO Friends Dolphins Rescue Mission (Model 41378) building set invites you to embark on an exciting underwater adventure. This set features a detailed sunken ship, a functional submarine robot, and various accessories designed for imaginative play centered around marine life rescue and treasure hunting. It is part of the LEGO Friends animal rescue series, encouraging creative storytelling and problem-solving.

Image: The complete LEGO Friends Dolphins Rescue Mission set, showing the product box and the assembled sunken ship, submarine, and figures.
2. What's in the Box
Your LEGO Friends Dolphins Rescue Mission set includes all the necessary bricks and elements to construct the models, along with specific character figures and accessories.
- Stephanie and Kacey mini-doll figures
- 2 dolphin figures
- Submarine robot with transparent cockpit
- Sunken ship structure with hinged mast
- 2 hidden treasure chests
- Water-reactive textile treasure map
- 2 diving helmets
- Various coral and sea creature elements
- Treasure chest gems
- Additional accessories: fins, baby bottle, ball, syringe, 2 wigs, and a grabbing tool
- Building instruction booklet (physical copy)

Image: A detailed view of the main components included in the set, such as the mini-dolls, submarine, shipwreck, and various accessories.
3. Setup and Assembly
The LEGO Friends Dolphins Rescue Mission set consists of 363 individual pieces that require assembly.
- Unpack Components: Carefully open the box and remove all plastic bags containing the LEGO bricks. It is recommended to sort the pieces by color or type to facilitate the building process.
- Consult Instructions: Refer to the detailed, step-by-step building instruction booklet provided within the package. Each step illustrates which pieces are needed and how they connect.
- Follow Sequence: Assemble the models by following the numerical sequence in the instruction booklet. Pay close attention to the orientation of the bricks.
- Secure Connections: Ensure all bricks are firmly pressed together to create stable and durable models.
- Mini-doll Assembly: Assemble the Stephanie and Kacey mini-doll figures as shown in the instructions, including their hair and accessories.
Important: This set is recommended for ages 6 years and up. Adult supervision is advised during assembly, especially for younger builders.

Image: Close-up of the mini-doll figures, demonstrating how their hair and accessories can be interchanged.
4. Operating and Play Features
Once assembled, the LEGO Friends Dolphins Rescue Mission set offers a variety of interactive play scenarios:
- Dolphin Rescue: Use the submarine robot to locate and rescue the two dolphin figures. The submarine features a transparent cockpit for the mini-dolls.
- Treasure Hunt: Explore the sunken ship for the two hidden treasure chests. The water-reactive textile treasure map reveals secrets when wet, guiding your adventure.
- Interactive Shipwreck: The shipwreck includes a hinged mast that can be manipulated using the submarine's grabbing tool, adding dynamic play elements.
- Role-Play: Engage in imaginative role-play with Stephanie and Kacey, simulating underwater exploration, animal care, and discovery.
- Expand Your World: This set is designed to combine with other LEGO Friends animal rescue sets (e.g., 41376 Turtles Rescue Mission, 41380 Lighthouse Rescue Center, 41381 Rescue Mission Boat) for even larger and more complex rescue adventures.

Image: The assembled submarine and shipwreck, showcasing the interactive elements and play potential.

Image: A child engaging in play with the LEGO Friends Dolphins Rescue Mission set, demonstrating its interactive nature.
5. Maintenance
To ensure the longevity and cleanliness of your LEGO set, follow these maintenance guidelines:
- Cleaning: For general cleaning, wipe the bricks with a soft, dry cloth. For deeper cleaning, wash LEGO bricks by hand using mild soap and water (maximum 40°C / 104°F).
- Drying: Rinse the bricks thoroughly with clear water to remove all soap residue. Air dry them completely at room temperature, away from direct sunlight or heat sources.
- Avoid Harsh Chemicals: Do not use harsh detergents, abrasive cleaners, or very hot water, as these can damage the plastic.
- Storage: Store the assembled models and loose bricks in a cool, dry place, away from direct sunlight to prevent discoloration and warping.
6. Troubleshooting
Should you encounter any issues with your LEGO Friends set, consider the following common solutions:
- Missing Pieces: If you find any pieces missing from your new set, please contact LEGO Customer Service directly. They have a dedicated service for replacing missing elements.
- Difficulty Assembling: Double-check the building instructions carefully. Ensure that each piece is correctly identified and oriented as shown in the diagrams. Sometimes, a small error in an early step can affect subsequent steps.
- Models Not Holding Together: Verify that all connections are firm. LEGO bricks are designed to fit snugly; apply gentle but firm pressure to ensure they are fully connected.
- Damaged Pieces: If any pieces are damaged upon opening the box, contact LEGO Customer Service for replacements.
7. Specifications
| Model Number | 41378 |
| Brand | LEGO |
| Product Dimensions | 5.65 x 38.2 x 26.2 cm (2.22 x 15.04 x 10.31 inches) |
| Product Weight | 520 g (1.15 lbs) |
| Number of Pieces | 363 |
| Recommended Age | 6 years and up |
| Educational Value | Building skills, imaginative play, problem-solving |
| Material Type | Plastic |

Image: A visual representation of the product's dimensions, indicating its size.
8. Safety Information
Please observe the following safety guidelines when using this product:
- WARNING: CHOKING HAZARD. This toy contains small parts and a small ball. Not suitable for children under 3 years due to potential choking hazards.
- Adult Supervision: Always ensure that children, especially those at the lower end of the recommended age range, are supervised by an adult during play and assembly.
- Intended Use: This product is a building toy and should be used as intended. Do not modify or attempt to use parts for purposes other than building the designated models.
9. Warranty and Support
LEGO products are manufactured to high-quality standards. For any inquiries regarding product warranty, missing parts, or general support, please refer to the official LEGO website.
You can typically find comprehensive support, FAQs, and contact information for customer service on www.lego.com/service.