Introduction
The LEGO City Water Police Detective Missions 60355 set offers an interactive building and play experience for children aged 6 and above. This innovative set moves beyond traditional paper instructions, immersing kids in digital adventure stories where they use real LEGO bricks to complete on-screen missions and story-led building challenges. The set includes a mission speedboat, a crooks' cell, a toy dog figure, and four minifigures, including Duke DeTain from the LEGO City Adventures TV series, two police officers, and a crook with scuba gear. Various accessories like a magnifying glass, life jacket, walkie-talkie, binoculars, handcuffs, camera, and treasure are also included to enhance the play. This playset requires a smartphone or tablet with the free LEGO Building Instructions app to access the interactive missions.

Image: The complete LEGO City Water Police Detective Missions 60355 set, showcasing the speedboat, minifigures, and various accessories.
What's in the Box
Your LEGO City Water Police Detective Missions 60355 set contains 278 LEGO building elements designed for an engaging interactive experience. The box includes:
- LEGO Building Elements for the mission speedboat, crooks' cell, and other scene elements.
- 4 Minifigures: Duke DeTain, 2 police officers, and a crook with scuba gear.
- 1 Toy Dog Figure.
- Accessories: Magnifying glass, life jacket, walkie-talkie, binoculars, handcuffs, camera, and treasure.
- Instruction leaflet with QR code for the LEGO Building Instructions app.

Image: An unboxing view of the LEGO City Water Police Detective Missions 60355 set, displaying the various bags of LEGO elements and the app instruction sheet.
Setup
To begin your interactive LEGO City Missions adventure, follow these steps:
- Download the App: Download the free LEGO Building Instructions app on your smartphone or tablet. This app is essential for accessing the digital building instructions and interactive missions.
- Scan the QR Code: Locate the QR code provided in the box or on the included leaflet. Scan this code using the LEGO Building Instructions app to load the specific missions for the 60355 set.
- Follow On-Screen Instructions: The app will guide you through the building process with interactive 3D instructions and story-driven challenges. Instead of a traditional booklet, the app provides dynamic guidance.
- Prepare Your Bricks: The LEGO elements are typically sorted into numbered bags. The app will indicate which bags to open for each stage of the mission.
Video: An official overview of the LEGO City Water Police Detective Missions, demonstrating the interactive play experience and app integration.
Video: A brief 7-second preview showcasing the LEGO City Water Police Detective Digital Building Toy Set, highlighting its digital features.
Operating the Missions
The core of the LEGO City Missions experience is interactive storytelling. The app guides players through various scenarios where they must build and modify their LEGO models to solve challenges and progress the story.
- Engage with Digital Stories: The app presents narratives and challenges that require creative problem-solving using physical LEGO bricks.
- Build and Rebuild: You will be prompted to build specific elements or modify your existing models (like the speedboat) to overcome obstacles in the digital story.
- Role-Play: Use the included minifigures and accessories to act out scenes and interact with on-screen characters, enhancing the immersive experience.
- Instruction-Free Challenges: The missions encourage imaginative building without rigid step-by-step instructions, fostering creativity and critical thinking.

Image: A child engaged in building the LEGO City Water Police Detective Missions speedboat, guided by the interactive instructions on a tablet.

Image: Overhead view of a child building a LEGO City set on a wooden floor, with the interactive app on a tablet providing story-based guidance.
Maintenance
Proper care ensures the longevity of your LEGO bricks and the continued enjoyment of your set.
- Cleaning: To clean LEGO bricks, use mild soap and lukewarm water (not exceeding 40°C or 104°F). Rinse thoroughly and air dry. Avoid hot water, harsh chemicals, or abrasive materials, as these can damage the plastic.
- Storage: Store LEGO bricks in a clean, dry place away from direct sunlight and extreme temperatures. Keep small parts organized to prevent loss.
- App Updates: Ensure the LEGO Building Instructions app is regularly updated to access the latest missions, features, and bug fixes.
Troubleshooting
If you encounter any issues with your LEGO City Water Police Detective Missions set or the accompanying app, consider the following:
- App Not Responding: Close and restart the LEGO Building Instructions app. Ensure your device's operating system is up to date and that you have a stable internet connection.
- Missing Pieces: While rare, if you find a piece missing, please visit the official LEGO Customer Service website to request replacement parts.
- Difficulty with Missions: The missions are designed to be challenging. If a child is struggling, encourage creative solutions or take a break and return to the mission later. The app often provides hints.
- Device Compatibility: Ensure your smartphone or tablet meets the minimum system requirements for the LEGO Building Instructions app.
For further assistance, please refer to the official LEGO Customer Service website.
Specifications
| Brand Name | LEGO |
| Model Name | Water Police Detective Missions 60355 |
| Model Number | 6385815 |
| Number of Pieces | 278 |
| Age Range Description | 6+ |
| Material Type | Plastic |
| Item Dimensions | 11.1 x 10.32 x 2.32 inches |
| Item Weight | 1.01 Pounds |
| Educational Objective | Creative Thinking |
| Assembly Required | No (digital instructions via app) |
Safety Information
Please observe the following safety guidelines:
- Choking Hazard: This set contains small parts and is not suitable for children under 3 years of age.
- Adult Supervision: While designed for independent play, adult supervision is recommended, especially during initial setup and for younger children.
- App Usage: Monitor screen time and ensure a safe and comfortable environment for tablet/smartphone use.
Warranty and Support
For detailed warranty information, product support, or to contact customer service regarding your LEGO City Water Police Detective Missions 60355 set, please visit the official LEGO website. You can find information on replacement parts, product registration, and frequently asked questions there.
Website: www.lego.com/service