Dive into Adventure!
Build Your Own Underwater Robot

Explore the ocean depths with this 207-piece LEGO® Creator 3-in-1 set! Rebuild into a submarine or crane for endless fun.

🏛 Creator 3-in-1
Set #31090

Underwater Robot

The Underwater Robot is a charming and versatile Creator 3-in-1 set.

🏆 Best For: Young LEGO fans and builders looking for a quick and enjoyable experience ⏱ 2 hr build 🧩 207 pcs 🎂 Ages 7+
★★★★☆ 4.2 from 3 reviews

Fans appreciate the set's posability and the creative alternate builds, making it a fun and versatile set. Some find the main model a bit simple, but overall it's considered a good value for a Creator 3-in-1 set.

MSRP
$19.99
Best Price
$17.99
You Save
10% OFF
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📝 Our Take

The Underwater Robot is a charming and versatile Creator 3-in-1 set. It perfectly captures the spirit of exploration with its posable joints, cool color scheme, and the alternate builds offering even more creative possibilities.

This set is perfect for younger LEGO enthusiasts and fans of robotics. The build is straightforward and fun, offering a great introduction to more complex LEGO models, plus it's a good display piece for a desk or shelf.

Skip this if you're looking for a highly challenging or intricate build. For a more complex underwater adventure, consider larger LEGO City Deep Sea Exploration sets.

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🧱 Building Experience

🧩
207
Pieces
2h
Build Time
📊
Beginner
Difficulty
👤
7+
Ages
Build Highlights:
  • Easy-to-follow instructions for all three models
  • Fun use of ball joints for posing the robot
  • Clever integration of the cockpit and accessories
  • Compact size makes it great for display

📈 Investment Analysis

↑ Trending up since release
B
Investment Grade
⏳ Appreciating
The Underwater Robot, being a retired Creator 3-in-1 set, has decent investment potential. Its relatively low piece count and original MSRP make it accessible, while the rising price trend indicates increasing demand. Creator 3-in-1 sets often hold value, especially those with unique designs and play features. However, its smaller size and piece count compared to larger, more complex sets may limit its long-term appreciation.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

📖 About This Set

Explore the depths of the ocean for sea treasures with the LEGO® Creator 3in1 31090 Underwater Robot, featuring highly posable joints, large transparent domed helmet, red robot eye, ballast tanks and huge feet for walking on the seabed. Remove the robot eye to transform the dome into a cockpit control center. The Underwater Robot toy also has a claw and drill at the end of its left arm and a grabber on its right. This set also includes a buildable manta ray and a small seabed build with a sea plant and golden nugget elements. With LEGO Creator 3in1 sets you get 3 different build and play experiences. Build the Underwater Robot and then rebuild it to create a toy Submarine or an Underwater Crane treasure hunt center for more deep-sea action and adventure.

  • Enjoy 3 building opportunities with this LEGO® Creator 3in1 set. Build the Underwater Robot and manta ray, then rebuild to create a toy Submarine with a manipulator arm, or an Underwater Crane treasure hunt center.
  • The Underwater Robot features highly flexible joints, viewing dome with red robot eye, mechanical-style hands with drill, claw and grabber, ballast tanks and large robot feet for traversing the seabed, plus a buildable manta ray and a small seabed build with a sea plant and golden nugget elements.
  • The Underwater Robot comes with a yellow, gray, black and red color scheme.
  • Open the Robot’s helmet and remove the robot eye to reveal a control console.
  • Move the Robot’s head, arms and legs to create cool action poses.
  • Venture to the depths of the ocean in search of underwater treasure with this futuristic robot, but watch out for the spiky-tailed manta ray!
  • Underwater Robot stands over 5” (14cm) high.
  • Manta ray measures over 1” (3cm) high, 2” (6cm) long and 2” (7cm) wide.
  • Toy Submarine measures over 3” (9cm) high, 6” (17cm) long and 5” (13cm) wide.
  • Underwater Crane measures over 4” (12cm) high, 5” (13cm) long and 7” (18cm) wide.

Compare Similar Sets

Compared to other Creator 3-in-1 sets in a similar price range, the Underwater Robot offers a unique theme and a fun build experience. While some may prefer sets with more pieces or minifigures, this set stands out for its posability and creative alternate builds. Consider other Creator 3-in-1 sets like the 31088-1 Deep Sea Creatures for more underwater themed builds.

📦 Full Parts Inventory - 78 unique parts • 203 total pieces

Bar Holder with Clip Bar Holder with Clip
Part #: 11090 White
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Technic Axle Pin ...
Part #: 11214 Dark Bluish Gray
Plate Special 1 x 2 with Pin Hole on Top Plate Special 1 x...
Part #: 11458 Black
Plate Special 1 x 2 with Clip Horizontal on Side Plate Special 1 x...
Part #: 11476 White
Slope Curved 2 x 1 No Studs [1/2 Bow] Slope Curved 2 x ...
Part #: 11477 Dark Blue
Plate Special 1 x 2 with 5.9mm Centre Side Towball Plate Special 1 x...
Part #: 14417 Dark Bluish Gray
Plate Special 1 x 2 5.9mm Towball Socket Plate Special 1 x...
Part #: 14418 Light Bluish Gray
Tile 2 x 2 Corner Tile 2 x 2 Corner
Part #: 14719 Light Bluish Gray
Tile Round 2 x 2 with Bottom Stud Holder Tile Round 2 x 2 ...
Part #: 14769 Dark Bluish Gray
Slope Curved 2 x 2 x 2/3 Slope Curved 2 x ...
Part #: 15068 Yellow
Technic Axle 5 with Stop Technic Axle 5 wi...
Part #: 15462 Reddish Brown
Tile Round 2 x 2 with Hole Tile Round 2 x 2 ...
Part #: 15535 Light Bluish Gray
Plate Round Half 3 x 6 with 1 x 2 Cutout Plate Round Half ...
Part #: 18646 Light Bluish Gray
Plate Special 1 x 2 with Handles on Ends Plate Special 1 x...
Part #: 18649 White
Plate Special 1 x 2 with Pin Hole Underneath Plate Special 1 x...
Part #: 18677 Light Bluish Gray
Tile Special 1 x 2 Grille with Bottom Groove Tile Special 1 x ...
Part #: 2412b Light Bluish Gray
Slope Curved 2 x 1 Inverted Slope Curved 2 x ...
Part #: 24201 Yellow
Tile Special 1 x 2 with Handle Tile Special 1 x ...
Part #: 2432 Red
Plate Special 1 x 1 Rounded with Handle Plate Special 1 x...
Part #: 26047 Black
Technic Axle Towball Technic Axle Towball
Part #: 2736 Light Bluish Gray
Technic Pin with Friction Ridges Lengthwise and Center Slots Technic Pin with ...
Part #: 2780 Black
Brick 1 x 2 Brick 1 x 2
Part #: 3004 Yellow
Plant, Sea Grass Plant, Sea Grass
Part #: 30093 Dark Green
Brick 1 x 4 Brick 1 x 4
Part #: 3010 White
Plate 2 x 4 Plate 2 x 4
Part #: 3020 Yellow
Plate 2 x 3 Plate 2 x 3
Part #: 3021 Yellow
Plate 2 x 2 Plate 2 x 2
Part #: 3022 White
Plate 2 x 2 Plate 2 x 2
Part #: 3022 Dark Blue
Plate 2 x 2 Plate 2 x 2
Part #: 3022 Yellow
Plate 1 x 2 Plate 1 x 2
Part #: 3023 Light Bluish Gray
Brick Round 2 x 2 x 2 Robot Body, Axle Holder '+' Orientation Brick Round 2 x 2...
Part #: 30361c Red
Brick Round 2 x 2 Dome Top, Hollow Stud Brick Round 2 x 2...
Part #: 30367c Red
Slope 45° 2 x 4 Slope 45° 2 x 4
Part #: 3037 Yellow
Bar 4L (Lightsaber Blade / Wand) Bar 4L (Lightsabe...
Part #: 30374 White
Hinge Cylinder 1 x 2 Locking with 1 Finger and Axle Hole On Ends Hinge Cylinder 1 ...
Part #: 30552 Dark Bluish Gray
Tile 2 x 2 with Groove Tile 2 x 2 with G...
Part #: 3068b Light Bluish Gray
Tile 1 x 2 with Groove Tile 1 x 2 with G...
Part #: 3069b Dark Blue
Tile 1 x 2 with Red 82, Yellow and White Gauges Print Tile 1 x 2 with R...
Part #: 3069bpr0101 Light Bluish Gray
Plate Special 3 x 2 with Rounded End, Hole Plate Special 3 x...
Part #: 3176 Yellow
Technic Axle and Pin Connector Angled #1 Technic Axle and ...
Part #: 32013 Red
Technic Beam 1 x 3 Thick Technic Beam 1 x ...
Part #: 32523 Red
Rock 1 1/3 x 1 1/3 x 1 Rock 1 1/3 x 1 1/...
Part #: 35646 Pearl Gold
Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Slope Inverted 45...
Part #: 3660 Yellow
Bracket 1 x 1 - 1 x 1 Inverted Bracket 1 x 1 - 1...
Part #: 36840 Dark Bluish Gray
Bracket 1 x 1 - 1 x 1 Bracket 1 x 1 - 1...
Part #: 36841 Medium Blue
Technic Plate 2 x 4 [3 Holes] Technic Plate 2 x...
Part #: 3709 White
Plate 1 x 4 Plate 1 x 4
Part #: 3710 Dark Bluish Gray
Plate 1 x 4 Plate 1 x 4
Part #: 3710 Yellow
Brick Round 2 x 2 with Axle Hole Brick Round 2 x 2...
Part #: 3941 Dark Bluish Gray
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Plate Round 2 x 2...
Part #: 4032a Tan
Technic Pin 1/2 Technic Pin 1/2
Part #: 4274 Blue
Technic Axle Pin with Friction Ridges Lengthwise Technic Axle Pin ...
Part #: 43093 Blue
Flag 2 x 2 Trapezoid with Flat Area between Clips Flag 2 x 2 Trapez...
Part #: 44676 Dark Blue
Dish 2 x 2 Inverted [Radar] Dish 2 x 2 Invert...
Part #: 4740 Trans-Neon Orange
Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction Technic Rotation ...
Part #: 47455 Black
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Socket Technic Brick Spe...
Part #: 48169 Dark Bluish Gray
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Vertical Side] Technic Brick Spe...
Part #: 48171 Dark Bluish Gray
Technic Brick Special 2 x 2 with Pin Hole, with 2 Rotation Joint Sockets Technic Brick Spe...
Part #: 48172 Black
Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Bar 1L with Clip ...
Part #: 48729b Dark Bluish Gray
Windscreen 6 x 6 x 3 Canopy Half Sphere with Dual 2 Fingers Windscreen 6 x 6 ...
Part #: 50747 Trans-Clear
Grille / Spoiler with 1 x 2 Plate, 2 x 2 Anti-studs (Racers Car) Grille / Spoiler ...
Part #: 50949 White
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Animal Body Part,...
Part #: 53451 Black
Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow Spokes Wheel 18 x 14 wit...
Part #: 55981 Yellow
Flexible Ribbed Hose 8mm Ends 19L Flexible Ribbed H...
Part #: 57539 Flat Silver
Window 1 x 2 x 2 Plane, Hollow Studs, Single Hole Top and Bottom for Glass Window 1 x 2 x 2 ...
Part #: 60032 Yellow
Brick Arch 1 x 3 x 2 Curved Top Brick Arch 1 x 3 ...
Part #: 6005 Yellow
Brick Special 1 x 1 with Clip Horizontal Brick Special 1 x...
Part #: 60476 Black
Plate Special 1 x 2 with Handle on End [Closed Ends] Plate Special 1 x...
Part #: 60478 Black
Slope 18° 2 x 1 x 2/3 with 4 Slots / Grate Slope 18° 2 x 1 x...
Part #: 61409 Black
Turntable 4 x 4 Square Base, Locking Turntable 4 x 4 S...
Part #: 61485 Light Bluish Gray
Plate Special 2 x 2 with Bar Frame Octagonal, Reinforced, Completely Round Studs Plate Special 2 x...
Part #: 75937 Black
Plate Round 1 x 1 with Open Stud Plate Round 1 x 1...
Part #: 85861 Pearl Gold
Slope 30° 1 x 2 x 2/3 Slope 30° 1 x 2 x...
Part #: 85984 Light Bluish Gray
Brick Round 4 x 4 Centre Hole Brick Round 4 x 4...
Part #: 87081 Black
Creature Body Part, Horn (Unicorn) Creature Body Par...
Part #: 89522 Flat Silver
Large Figure Weapon Claw, with Clip Large Figure Weap...
Part #: 92220 Flat Silver
Slope Curved 4 x 2 No Studs Slope Curved 4 x ...
Part #: 93606 Yellow
Tile Round 1 x 1 Tile Round 1 x 1
Part #: 98138 Trans-Light Blue
Arm Mechanical with Clip [Thick Support] Arm Mechanical wi...
Part #: 98313 Black
Spoiler 2 x 4 with Handle [Plain] Spoiler 2 x 4 wit...
Part #: 98834 Yellow
Bracket 1 x 2 - 2 x 2 Inverted Bracket 1 x 2 - 2...
Part #: 99207 Light Bluish Gray
This set features a good selection of yellow and black pieces, useful for building robots and other mechanical creations. The Technic rotation joints are particularly valuable for adding articulation to MOCs.

🛒 Where to Buy

eBay
✓ In Stock
$17.99
LEGO (UK)
✓ In Stock
£17.99
Walmart
✓ In Stock
$18.99
Target
✓ In Stock
$19.99
LEGO (DE)
✓ In Stock
€19.99
LEGO (US)
✓ In Stock
$19.99
LEGO (CA)
✓ In Stock
$24.99
Amazon

💎 Notable Parts

Black Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction (6x) $1.80
Dark Bluish Gray Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Vertical Side] (6x) $1.80
Yellow Plate Special 3 x 2 with Rounded End, Hole (4x) $0.60
Est. BrickLink Part Value
$4.20

💡 MOC Potential

🤖 A larger, more detailed robot with enhanced articulation
🚗 A futuristic submarine or underwater vehicle
🌳 A coral reef scene with various sea creatures

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

1 video found
BlockTalk AI

What the Community Says

1 YouTube reviews
BlockTalk AI Summary
Community Content: These reviews are from Reddit and YouTube users sharing their personal experiences. Opinions may vary.

📖 Building Instructions 6

Underwater Robot Instructions
BI 3004 60, 31090 1/3 V29
Download PDF
Underwater Robot Instructions
BI 3004/48, 31090 2/3 V29
Download PDF
Underwater Robot Instructions
BI 3004/32, 31090 3/3 V29
Download PDF
Underwater Robot Instructions
BI 3004 60, 31090 1/3 V39
Download PDF
Underwater Robot Instructions
BI 3004/48, 31090 2/3 V39
Download PDF
Underwater Robot Instructions
BI 3004/32, 31090 3/3 V39
Download PDF

Charts Inventory Statistics

78
Unique Parts
206
Total Pieces
0
Minifigures
Inventory Version: 2