How many pieces are in the Bikini Bottom Undersea Party?

Bikini Bottom Undersea Party contains 471 pieces.

What age is the Bikini Bottom Undersea Party recommended for?

This set is recommended for ages 6-12.

When was the Bikini Bottom Undersea Party released?

Bikini Bottom Undersea Party was released in 2012.

LEGO Bikini Bottom Undersea Party set 3818

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🏛 SpongeBob SquarePants

Set #3818

Bikini Bottom Undersea Party

Bikini Bottom Undersea Party is a wonderfully whimsical recreation of SpongeBob's world.

Before you buy

Who it's for: Ages 6+ · Beginner build Ideal for younger builders and fans of SpongeBob SquarePants who enjoy imaginative play.
Build: 471 pieces · about 4.5 hours Build time is an estimate.
Price: $49.99 list price · 10.6¢ per piece
Availability: Retired at LEGO

★★★☆☆ 3.8 community rating

Fans appreciate the set's accurate representation of Bikini Bottom and the inclusion of key characters. Some find the building experience repetitive, but overall, it's considered a fun and nostalgic set for SpongeBob enthusiasts.

$49.99

Best Price

$44.99

You Save

10% OFF

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

Bikini Bottom Undersea Party is a wonderfully whimsical recreation of SpongeBob's world. This set brings the iconic houses of SpongeBob, Squidward, and Patrick to life, complete with fun details and instantly recognizable characters.

This set is perfect for younger LEGO fans and SpongeBob enthusiasts. The build is straightforward and engaging, offering plenty of play possibilities with the included minifigures and accessories.

Skip this if you're looking for a challenging build or highly detailed display model. Consider larger, more intricate sets from themes like LEGO Ideas or Creator Expert for a more complex building experience.

✨ New

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Try asking:

How does this set compare to other SpongeBob LEGO sets in terms of design and playability? What are some creative ways to expand the Bikini Bottom layout using additional LEGO bricks? Is this set a good value for the piece count and included minifigures? How should I display this set to best showcase its unique features?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

471

Pieces

⏱

4.5h

Estimated Build Time

📊

Beginner

Difficulty

👤

6-12

Ages

Build Highlights:

Simple, colorful design captures the essence of Bikini Bottom.
Easy-to-follow instructions make it accessible for younger builders.
Fun play features like the cake catapult add to the interactive experience.
Houses can be arranged in different configurations for varied display options.

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

Not enough price history for a trend

Investment Grade

⏳ Retired

The Bikini Bottom Undersea Party set offers moderate investment potential. Its retirement and the enduring popularity of SpongeBob SquarePants are positive factors. The set's relatively low piece count and original MSRP may limit significant price appreciation. However, sealed copies in excellent condition could see a steady increase in value over the long term, especially among collectors of licensed themes.

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

📖 About This Set

Everyone’s welcome at the Bikini Bottom Undersea Party!

SpongeBob™ is throwing a huge party and everyone is invited! While Patrick is at the turntable spinning his favorite tunes, Squidward mans the juice bar and SpongeBob is catapulting the party cake at Mrs. Puff! Includes SpongeBob’s house, Squidward’s house and 4 minifigures: SpongeBob, Patrick, Squidward, and Mrs. Puff.

Includes 4 minifigures: SpongeBob, Patrick, Squidward and Mrs. Puff
Features DJ table and speakers, merry-go-round, seesaw and juice bar with cabinet
Also includes Gary
SpongeBob’s house features bed with ejecting function and Gary’s bowl
Squidward’s house features music stand and art studio
Spin the merry-go-round!
Play on the moving seesaw!
Catapult the cake!
SpongeBob’s house measures 6” (15cm) wide and 8” (20cm) tall
Squidward’s house measures 3” (7cm) wide and 6” (15cm) talL

⚖ Compare Similar Sets

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SpongeBob SquarePants • 109 pcs

$10.99

Compared to other licensed sets in this price range, the Bikini Bottom Undersea Party offers a unique charm and nostalgia for SpongeBob fans. While sets like LEGO City offer more versatile building experiences, this set stands out for its specific theme and iconic character representation. Collectors interested in display might prefer the detail of LEGO Ideas sets, but this set excels in playability for younger audiences.

4 Minifigures Included

Mrs. Puff with Flower

3 parts

Patrick Star with Lei and Sunglasses

3 parts

B+

SpongeBob Squarepants with Lei

3 parts

B+

Squidward Tentacles with Lei

3 parts

The set includes four iconic SpongeBob characters: SpongeBob, Patrick, Squidward, and Mrs. Puff, each with unique accessories like leis and sunglasses, adding to the set's collectible appeal.

📦 Parts Inventory

Official piece count: 471
Parts cataloged in this inventory: 124 unique parts, 459 pieces
Minifigures: 4

The official piece count includes the 12 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Tile Special 1 x ...

Part #: 12825 1× Yellow

Tile Special 1 x ...

Part #: 12825 3× Light Bluish Gray

Plant, Cherries

Part #: 22667 1× Lime

Wedge Plate 3 x 6...

Part #: 2419 2× Orange

Tile 1 x 4 with G...

Part #: 2431 2× Dark Brown

Tile Special 1 x ...

Part #: 2432 2× Yellow

Bracket 1 x 2 - 1...

Part #: 2436 1× Light Bluish Gray

Brick Sloped Inve...

Part #: 2449 8× Orange

Brick 1 x 1 x 5 w...

Part #: 2453b 1× Light Bluish Gray

Brick 1 x 1 x 5 w...

Part #: 2453b 2× Reddish Brown

Brick 1 x 2 x 5 w...

Part #: 2454a 4× Dark Bluish Gray

Plate Round 2 x 2...

Part #: 2654 6× Blue

Plate Round 2 x 2...

Part #: 2654 2× Trans-Clear

Plate Special 2 x...

Part #: 2817 2× Light Bluish Gray

Brick 2 x 4

Part #: 3001 2× Light Bluish Gray

Brick 2 x 2

Part #: 3003 1× Dark Blue

Brick 2 x 2

Part #: 3003 1× Light Bluish Gray

Brick 1 x 2

Part #: 3004 6× Light Bluish Gray

Brick 1 x 2

Part #: 3004 6× Blue

Brick 1 x 2

Part #: 3004 8× Orange

Brick 1 x 1

Part #: 3005 3× Light Bluish Gray

Brick 1 x 1

Part #: 3005 2× Blue

Brick 1 x 1

Part #: 3005 9× Orange

Brick 1 x 4

Part #: 3010 5× Light Bluish Gray

Brick 1 x 4

Part #: 3010 4× Orange

Brick 1 x 4

Part #: 3010 2× Blue

Brick 2 x 2 x 3

Part #: 30145 4× Light Bluish Gray

Plant, Round 1 x ...

Part #: 30176 2× Green

Plate 2 x 4

Part #: 3020 2× Orange

Plate 2 x 4

Part #: 3020 5× Reddish Brown

Plate 2 x 3

Part #: 3021 2× Tan

Plate 2 x 3

Part #: 3021 5× Dark Bluish Gray

Plate 2 x 2

Part #: 3022 4× Red

Food Popsicle / L...

Part #: 30222 1× Trans-Neon Green

Part #: 3024 1× White

Part #: 3034 1× Dark Bluish Gray

Plate 4 x 8

Part #: 3035 1× Dark Bluish Gray

Plate Round Corne...

Part #: 30357 4× Red

Brick Round 2 x 2...

Part #: 30367b 2× Yellow

Brick Round 2 x 2...

Part #: 30367b 1× Dark Green

Brick Round 2 x 2...

Part #: 30367b 2× Red

Bar 4L (Lightsabe...

Part #: 30374 1× Black

Bar 4L (Lightsabe...

Part #: 30374 2× White

Brick Sloped 45° ...

Part #: 3039 2× Orange

Brick Sloped 45° ...

Part #: 3040b 2× Light Bluish Gray

Brick Sloped 45° ...

Part #: 3048c 10× Orange

Hinge Cylinder 1 ...

Part #: 30552 1× Black

Brick Round 1 x 1...

Part #: 3062b 3× Tan

Brick Round 1 x 1...

Part #: 3062b 2× Blue

Tile 2 x 2 with G...

Part #: 3068b 2× White

Tile 2 x 2 with G...

Part #: 3068b 2× Reddish Brown

Tile 2 x 2 with G...

Part #: 3068b 3× Orange

Tile 1 x 2 with G...

Part #: 3069b 1× Blue

Tile 1 x 2 with G...

Part #: 3069b 2× Light Bluish Gray

Tile 1 x 2 with G...

Part #: 3069b 7× Medium Blue

Tile 1 x 2 with S...

Part #: 3069bpr0086 1× Light Bluish Gray

Plate Special 1 x...

Part #: 32028 2× Light Bluish Gray

Technic Axle 2 No...

Part #: 32062 2× Black

Technic Beam 1 x ...

Part #: 32316 1× White

Brick 1 x 2 x 2 w...

Part #: 3245c 6× Light Bluish Gray

Technic Pin Conne...

Part #: 32530 2× Black

Technic Pin Long ...

Part #: 32556 1× Tan

Brick Arch 1 x 8 x 2

Part #: 3308 1× Dark Bluish Gray

Plant, Carrot Top

Part #: 33183 2× Bright Green

Brick 1 x 3

Part #: 3622 2× Orange

Part #: 3660 4× Orange

Brick Sloped Inve...

Part #: 3660 2× Dark Bluish Gray

Brick Sloped Inve...

Part #: 3665 1× Blue

Brick Sloped Inve...

Part #: 3665 2× Orange

Brick Sloped Inve...

Part #: 3665 2× Dark Bluish Gray

Plate 1 x 6

Part #: 3666 4× Orange

Plate 1 x 6

Part #: 3666 2× Red

Technic Pin witho...

Part #: 3673 2× Light Bluish Gray

Brick Sloped 65° ...

Part #: 3678b 6× Light Bluish Gray

Turntable 2 x 2 P...

Part #: 3679 2× Light Bluish Gray

Turntable 2 x 2 P...

Part #: 3680 2× Blue

Brick Sloped 75° ...

Part #: 3685 2× Light Bluish Gray

Technic Brick 1 x...

Part #: 3700 1× Black

Plate 1 x 4

Part #: 3710 3× Reddish Brown

Plate Special 1 x...

Part #: 3794b 1× Black

Plate Special 1 x...

Part #: 3794b 1× Green

Plate 2 x 6

Part #: 3795 2× Reddish Brown

Part #: 3899 2× Trans-Clear

Hinge Brick 1 x 2...

Part #: 3937 2× Dark Bluish Gray

Brick Round 2 x 2...

Part #: 3941 1× Blue

Cone 2 x 2 x 2, O...

Part #: 3942c 1× Blue

Antenna 1 x 4 wit...

Part #: 3957b 1× White

Dish 8 x 8 Invert...

Part #: 3961 1× Orange

Plate Round 2 x 2...

Part #: 4032a 1× Reddish Brown

Plate Round 2 x 2...

Part #: 4032a 1× White

Seat / Chair 2 x ...

Part #: 4079b 1× Blue

Plate Special 1 x...

Part #: 4085c 2× Blue

Plate Special 1 x...

Part #: 4085c 1× White

Tile Round 2 x 2 ...

Part #: 4150 2× Black

Brick Sloped 33° ...

Part #: 4286 2× Light Bluish Gray

Technic Axle Pin ...

Part #: 43093 1× Blue

Box 2 x 2 x 2 [Ho...

Part #: 4345b 1× Red

Box 2 x 2 x 2 Doo...

Part #: 4346 1× Trans-Clear

Dish 3 x 3 Invert...

Part #: 43898 2× Blue

Dish 3 x 3 Invert...

Part #: 43898 1× Red

Brick Sloped 75° ...

Part #: 4460b 8× Orange

Tool Hammer / Mal...

Part #: 4522 1× Black

Treasure Chest Bo...

Part #: 4738b 2× Reddish Brown

Dish 2 x 2 Invert...

Part #: 4740 4× Black

Dish 2 x 2 Invert...

Part #: 4740pr0016 2× Bright Pink

Brick Special 1 x...

Part #: 47905 1× Tan

Boat / Ship Wheel...

Part #: 4790b 1× Reddish Brown

Plate Special 1 x...

Part #: 48336 5× Red

Panel 1 x 2 x 1 [...

Part #: 4865a 1× Trans-Brown

Panel 1 x 2 x 1 [...

Part #: 4865b 1× Black

Brick Special 1 x...

Part #: 52107 3× Red

Brick Sloped 30° ...

Part #: 54200 4× Medium Blue

Brick Sloped 30° ...

Part #: 54200 16× Orange

Brick Sloped 30° ...

Part #: 54200 6× Light Bluish Gray

Wedge Plate 6 x 3...

Part #: 54383 4× Orange

Wedge Plate 6 x 3...

Part #: 54384 4× Orange

Light Cover 1 x 1...

Part #: 58176 1× Trans-Red

Cone 1 x 1 [Top G...

Part #: 59900 1× Reddish Brown

Hinge Plate 1 x 2...

Part #: 60471 1× Black

Plate Round 4 x 4...

Part #: 60474 1× Dark Bluish Gray

Panel 1 x 4 x 3 [...

Part #: 60581 2× Orange

Brick Special 1 x...

Part #: 60583b 1× Black

Window 1 x 2 x 2 ...

Part #: 60592 2× Reddish Brown

Brick Curved 1 x ...

Part #: 6091 2× Blue

Hinge Brick 2 x 2...

Part #: 6134 2× Black

Bar 1 x 6 [Closed...

Part #: 6140 1× White

Plate Round 1 x 1...

Part #: 6141 1× Trans-Yellow

Plate Round 1 x 1...

Part #: 6141 4× Lime

Plate Round 1 x 1...

Part #: 6141 2× Black

Plate Round 1 x 1...

Part #: 6141 15× Orange

Plate Round 1 x 1...

Part #: 6141 5× Flat Silver

Plate Round 1 x 1...

Part #: 6141 2× Trans-Light Blue

Plate Round 1 x 1...

Part #: 6141 4× Pearl Gold

Plant, Palm Leaf ...

Part #: 6148 5× Green

Turntable 4 x 4 S...

Part #: 61485 1× Black

Bar 1 x 4 x 2

Part #: 6187 4× Yellow

Equipment Dish / ...

Part #: 6256 1× Bright Light Orange

Tile 1 x 3

Part #: 63864 2× White

Door 1 x 4 x 6 Ro...

Part #: 64390 1× Reddish Brown

Equipment Telesco...

Part #: 64644 1× Black

Equipment Telesco...

Part #: 64644 2× Dark Brown

Flame / Headwear ...

Part #: 64647 2× Trans-Neon Orange

Technic Brick 1 x...

Part #: 6541 4× Black

Technic Pin with ...

Part #: 6628 1× Black

Hinge Plate 1 x 4...

Part #: 73983 8× Red

Brick Special 1 x...

Part #: 87087 1× Dark Bluish Gray

Panel 1 x 2 x 2 [...

Part #: 87552 1× Red

Panel 1 x 2 x 2 w...

Part #: 87552pr0006 2× Trans-Clear

Plate Special 2 x...

Part #: 87580 1× Dark Blue

Plate Special 2 x...

Part #: 87580 6× Medium Blue

Plate Special 1 x...

Part #: 92280 12× Red

Brick Round 2 x 2...

Part #: 92947 1× Tan

Brick Arch 1 x 6 ...

Part #: 92950 2× Blue

Brick Arch 1 x 6 ...

Part #: 92950 3× Light Bluish Gray

Tile Special 2 x ...

Part #: 98549 1× White

🧱 Sticker Sheet for...

Part #: 72333 1× [No Color/Any Color]

The set features a vibrant array of orange and red pieces, ideal for builders looking to add bright colors to their collection. The inclusion of various slopes and hinge plates offers versatility for creating unique structures and designs.

🛒 Where to Buy

eBay

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Walmart

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$47.49

Target

✓ In Stock

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$49.99

LEGO (UK)

✓ In Stock

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£49.99

LEGO (US)

✓ In Stock

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$49.99

LEGO (CA)

✓ In Stock

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$64.99

💎 Notable Parts

Red Plate Special 1 x 2 [Top Clip] (12x) $1.80

Orange Slope 45° 2 x 1 Triple with Ovoid Bottom Pin (10x) $1.00

Red Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] (8x) $2.40

Medium Blue Tile 1 x 2 with Groove (7x) $0.70

Red Plate Special 1 x 2 [Side Handle Closed Ends] (5x) $0.75

Est. BrickLink Part Value

$6.65

💡 MOC Potential

🏙 Expand Bikini Bottom with additional buildings and landmarks.

🌳 Create an underwater coral reef environment.

🚗 Build the Invisible Boatmobile.

Community Insights

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Inventory Statistics

124

Unique Parts

471

Official Piece Count

459

Cataloged Inventory Pieces

Minifigures

Spare Parts

The official piece count includes the 12 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Inventory Version: 2

Missing a piece? Use the Missing Piece Checker.