Who lives in a pineapple under the sea?
The Build-A-Bob LEGO set!

Build your own interactive SpongeBob with 445 pieces and control him with the exclusive Plankton minifigure! Released in 2006, this set brings Bikini Bottom fun to your LEGO collection.

🏛 SpongeBob SquarePants
Set #3826

Build-A-Bob

Build-A-Bob is a quirky and unique LEGO set from the SpongeBob SquarePants theme.

🏆 Best For: Kids and SpongeBob SquarePants fans ⏱ 3 hr build 🧩 445 pcs 🎂 Ages 7+
★★★☆☆ 3.7 from 3 reviews

Fans appreciate the set's unique concept and the inclusion of the Plankton minifigure. Some find the building experience simple and enjoyable, while others criticize the limited complexity and somewhat blocky appearance of the final model.

📝 Our Take

Build-A-Bob is a quirky and unique LEGO set from the SpongeBob SquarePants theme. Released in 2006, it allows you to construct a customizable SpongeBob figure, offering a playful twist on the traditional LEGO building experience and capturing the show's whimsical nature.

This set is perfect for SpongeBob fans and those looking for a fun, lighthearted build. The building experience is straightforward and enjoyable, making it suitable for younger builders or anyone seeking a nostalgic trip back to Bikini Bottom.

Skip this if you prefer more complex or detailed LEGO models. While charming, Build-A-Bob prioritizes playability and customization over intricate design, consider other display-focused sets if that's your preference.

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How does this set compare to other SpongeBob SquarePants LEGO sets in terms of collectibility? What are some creative ways to customize the 'Build-A-Bob' figure? Is this set a good entry point for someone new to LEGO collecting? How does the inclusion of the Plankton minifigure affect the set's overall value?

🧱 Building Experience

🧩
445
Pieces
3h
Build Time
📊
Beginner
Difficulty
👤
7-12
Ages
Build Highlights:
  • Fun and interactive build
  • Customizable features allow for different expressions
  • Easy-to-follow instructions
  • Playful design captures the essence of SpongeBob

📈 Investment Analysis

↑ Trending up since release
B
Investment Grade
⏳ Appreciating
The Build-A-Bob set presents a moderate investment opportunity. Its status as a retired set from a popular licensed theme (SpongeBob SquarePants) contributes to its potential for appreciation. The set's unique concept and the inclusion of a Plankton minifigure add to its appeal among collectors. However, its relatively small piece count and focus on playability might limit its potential for significant value increase compared to larger, more complex sets. Investment potential is tied to the continued popularity of the SpongeBob franchise and the demand from nostalgic collectors. The rising price trend indicates growing interest, but careful monitoring of market trends is essential.

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

📖 About This Set

Just when you thought things couldn't get any wackier in Bikini Bottom…Plankton has taken over SpongeBob's brain and is making him do some wild things! Plankton can make SpongeBob spin his eyes, shoot jellyfish from his mouth, and change SpongeBob's expression from a frown to a smile. Set includes Plankton minifigure, jellyfish to shoot and much more! SpongeBob measures over 11.5 inches (29.2 cm) tall! Includes SpongeBob comic strip on the box!

Compare Similar Sets

Compared to other SpongeBob SquarePants sets, Build-A-Bob stands out for its unique customizable figure. While sets like the Krusty Krab (3833-1) offer more of a traditional LEGO building experience with detailed locations, Build-A-Bob prioritizes playability and character interaction. Collectors interested in minifigures and iconic locations might prefer the Krusty Krab, while those seeking a more interactive and customizable model might find Build-A-Bob more appealing.

1 Minifigures Included

The set includes a Plankton minifigure, which is a desirable character from the SpongeBob SquarePants series, adding to the set's collectibility.

📦 Full Parts Inventory - 94 unique parts • 441 total pieces

Brick 4 x 6 Brick 4 x 6
Part #: 2356 Light Bluish Gray
Brick 2 x 2 Corner Brick 2 x 2 Corner
Part #: 2357 Black
Tile Special 1 x 2 Grille with Bottom Groove Tile Special 1 x ...
Part #: 2412b Light Bluish Gray
Tile 1 x 4 with Train Controls Print Tile 1 x 4 with T...
Part #: 2431pr0028 Dark Bluish Gray
Slope Inverted 75° 2 x 1 x 3 Slope Inverted 75...
Part #: 2449 32× Yellow
Brick 2 x 6 Brick 2 x 6
Part #: 2456 Yellow
Brick 2 x 6 Brick 2 x 6
Part #: 2456 White
Brick 1 x 16 Brick 1 x 16
Part #: 2465 Yellow
Tile Special 1 x 1 with Clip and Straight Tips Tile Special 1 x ...
Part #: 2555 Black
Brick Round Corner 4 x 4 Full Brick Brick Round Corne...
Part #: 2577 Black
Lever Small Base with Black Lever Lever Small Base ...
Part #: 298c02 Black
Lever Small Base with Black Lever Lever Small Base ...
Part #: 298c02 Sand Green
Lever Small Base with Black Lever Lever Small Base ...
Part #: 298c02 Red
Brick Special 2 x 2 with 2 Pins and Axle Hole Brick Special 2 x...
Part #: 30000 Blue
Brick 2 x 4 Brick 2 x 4
Part #: 3001 Light Bluish Gray
Brick 2 x 2 Brick 2 x 2
Part #: 3003 Black
Brick 2 x 2 Brick 2 x 2
Part #: 3003 10× Yellow
Brick 2 x 2 Brick 2 x 2
Part #: 3003 Light Bluish Gray
Brick 1 x 2 Brick 1 x 2
Part #: 3004 Dark Bluish Gray
Brick 1 x 2 Brick 1 x 2
Part #: 3004 Reddish Brown
Brick 1 x 2 Brick 1 x 2
Part #: 3004 Black
Brick 1 x 2 Brick 1 x 2
Part #: 3004 24× Yellow
Brick 1 x 1 Brick 1 x 1
Part #: 3005 18× Yellow
Brick 1 x 1 Brick 1 x 1
Part #: 3005 Black
Brick 1 x 6 Brick 1 x 6
Part #: 3009 Black
Brick 1 x 6 Brick 1 x 6
Part #: 3009 26× Yellow
Brick 1 x 6 Brick 1 x 6
Part #: 3009 White
Brick 1 x 4 Brick 1 x 4
Part #: 3010 White
Brick 1 x 4 Brick 1 x 4
Part #: 3010 Reddish Brown
Brick 1 x 4 Brick 1 x 4
Part #: 3010 14× Yellow
Plate 2 x 4 Plate 2 x 4
Part #: 3020 White
Plate 2 x 2 Plate 2 x 2
Part #: 3022 White
Plate 1 x 2 Plate 1 x 2
Part #: 3023 White
Plate 1 x 2 Plate 1 x 2
Part #: 3023 Yellow
Plate 4 x 4 Plate 4 x 4
Part #: 3031 Dark Bluish Gray
Plate 4 x 6 Plate 4 x 6
Part #: 3032 Yellow
Plate 6 x 10 Plate 6 x 10
Part #: 3033 Yellow
Plate 2 x 8 Plate 2 x 8
Part #: 3034 Dark Bluish Gray
Plate Round Corner 3 x 3 Plate Round Corne...
Part #: 30357 Dark Bluish Gray
Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder Brick Round 2 x 2...
Part #: 30367b Yellow
Slope 45° 2 x 2 Slope 45° 2 x 2
Part #: 3039 Black
Slope 45° 2 x 2 with Radar Screen Print Slope 45° 2 x 2 w...
Part #: 3039pr0005 White
Slope 45° 2 x 1 with Bottom Pin Slope 45° 2 x 1 w...
Part #: 3040b Black
Brick Special 1 x 4 with 4 Studs on One Side Brick Special 1 x...
Part #: 30414 Red
Plate Round Corner 4 x 4 Plate Round Corne...
Part #: 30565 Dark Bluish Gray
Brick Round Corner 2 x 2 Macaroni with Stud Notch Brick Round Corne...
Part #: 3063b Black
Tile 2 x 2 with Groove Tile 2 x 2 with G...
Part #: 3068b Red
Tile 1 x 2 with Groove Tile 1 x 2 with G...
Part #: 3069b Yellow
Tile 1 x 2 with Computer Keyboard Standard Print Tile 1 x 2 with C...
Part #: 3069bpr0030 White
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 Black
Technic Axle and Pin Connector Angled #2 - 180° Technic Axle and ...
Part #: 32034 Black
Technic Axle 2 Notched Technic Axle 2 No...
Part #: 32062 Red
Technic Bush 1/2 Smooth with Axle Hole Reduced Technic Bush 1/2 ...
Part #: 32123a Light Bluish Gray
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Technic Gear 20 T...
Part #: 32269 Light Bluish Gray
Technic Gear 12 Tooth Double Bevel Technic Gear 12 T...
Part #: 32270 Light Bluish Gray
Technic Gear 36 Tooth Double Bevel Technic Gear 36 T...
Part #: 32498 Black
Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside Brick Arch 1 x 6 ...
Part #: 3307 Yellow
Minifig Head [Plain] [Blocked Open Stud] Minifig Head [Pla...
Part #: 3626b White
Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Slope Inverted 45...
Part #: 3660 10× Yellow
Plate 1 x 6 Plate 1 x 6
Part #: 3666 Red
Plate 1 x 6 Plate 1 x 6
Part #: 3666 Yellow
Technic Brick 1 x 2 [1 Pin Hole] Technic Brick 1 x...
Part #: 3700 Tan
Technic Axle 4 Technic Axle 4
Part #: 3705 Black
Plate 1 x 4 Plate 1 x 4
Part #: 3710 White
Technic Axle 10 Technic Axle 10
Part #: 3737 Black
Technic Axle Pin without Friction Ridges Lengthwise Technic Axle Pin ...
Part #: 3749 Tan
Plate 2 x 6 Plate 2 x 6
Part #: 3795 Yellow
Plate 2 x 6 Plate 2 x 6
Part #: 3795 Reddish Brown
Plate 2 x 6 Plate 2 x 6
Part #: 3795 Red
Technic Brick 1 x 6 [5 Pin Holes] Technic Brick 1 x...
Part #: 3894 Yellow
Hat, Chef / Baker Hat, Chef / Baker
Part #: 3898 Trans-Clear
Hinge Brick 1 x 2 Base Hinge Brick 1 x 2...
Part #: 3937 Yellow
Hinge Brick 1 x 2 Top Plate Thin Hinge Brick 1 x 2...
Part #: 3938 White
Brick Round 2 x 2 with Axle Hole Brick Round 2 x 2...
Part #: 3941 White
Brick Round 2 x 2 with Axle Hole Brick Round 2 x 2...
Part #: 3941 Yellow
Plate 6 x 6 Plate 6 x 6
Part #: 3958 Reddish Brown
Dish 8 x 8 Inverted [Radar] with Medium Blue Circle with Black Center Print Dish 8 x 8 Invert...
Part #: 3961pr0011 White
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Plate Round 2 x 2...
Part #: 4032a White
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Plate Round 2 x 2...
Part #: 4032a Red
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Plate Round 2 x 2...
Part #: 4032a Blue
Brick Special 1 x 1 with Headlight Brick Special 1 x...
Part #: 4070 Yellow
Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Plate Special 1 x...
Part #: 4081b Red
Rubber Band / Belt Holder 2 x 6 x 2 1/3 Rubber Band / Bel...
Part #: 41753 Dark Bluish Gray
Wedge 4 x 2 Right Wedge 4 x 2 Right
Part #: 41767 Black
Wedge 4 x 2 Left Wedge 4 x 2 Left
Part #: 41768 Black
Wedge Plate 4 x 2 Right Wedge Plate 4 x 2...
Part #: 41769 Dark Bluish Gray
Wedge Plate 4 x 2 Left Wedge Plate 4 x 2...
Part #: 41770 Dark Bluish Gray
Brick Curved 6 x 1 Brick Curved 6 x 1
Part #: 42022 Black
Panel 1 x 4 x 1 with Rounded Corners [Thick Wall] Panel 1 x 4 x 1 w...
Part #: 43337 Dark Bluish Gray
Wedge Plate 3 x 2 Right Wedge Plate 3 x 2...
Part #: 43722 White
Wedge Plate 3 x 2 Right Wedge Plate 3 x 2...
Part #: 43722 Red
Wedge Plate 3 x 2 Left Wedge Plate 3 x 2...
Part #: 43723 Red
Wedge Plate 3 x 2 Left Wedge Plate 3 x 2...
Part #: 43723 White
Brick Curved 6 x 2 Brick Curved 6 x 2
Part #: 44126 Black
Hinge Plate 1 x 2 Locking with 1 Finger On End, with Groove Hinge Plate 1 x 2...
Part #: 44301a Yellow
Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Hinge Plate 1 x 2...
Part #: 44302a Yellow
Tap 1 x 1 with Hole in Spout Tap 1 x 1 with Ho...
Part #: 4599a Light Bluish Gray
Dish 2 x 2 Inverted [Radar] Dish 2 x 2 Invert...
Part #: 4740 Black
Technic Brick Special 2 x 2 with Axle Hole, Rotation Joint Ball Half [Vertical Side], Vertical Axle Hole End Technic Brick Spe...
Part #: 47431 Yellow
Technic Brick Special 2 x 3 with Pin Holes, Rotation Joint Ball Half [Horizontal Top], Rotation Joint Socket Technic Brick Spe...
Part #: 47454 Yellow
Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction Technic Rotation ...
Part #: 47455 Yellow
Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs Brick Round Corne...
Part #: 48092 Black
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Socket Technic Brick Spe...
Part #: 48169 White
Plate Special 1 x 2 [Side Handle Closed Ends] Plate Special 1 x...
Part #: 48336 Black
Sticker Sheet for Set 3826-1 Sticker Sheet for...
Part #: 56215 [No Color/Any Color]
Brick Curved 2 x 4 x 1 1/3 Brick Curved 2 x ...
Part #: 6081 Yellow
Brick Curved 1 x 2 x 1 1/3 with Curved Top Brick Curved 1 x ...
Part #: 6091 Yellow
Brick 1 x 10 Brick 1 x 10
Part #: 6111 Yellow
Brick 1 x 12 Brick 1 x 12
Part #: 6112 Reddish Brown
Brick 1 x 12 Brick 1 x 12
Part #: 6112 White
Plate Round 1 x 1 with Solid Stud Plate Round 1 x 1...
Part #: 6141 Trans-Dark Blue
Plate Round 1 x 1 with Solid Stud Plate Round 1 x 1...
Part #: 6141 Trans-Yellow
Plate Special 6 x 12 with Studs on 3 Edges Plate Special 6 x...
Part #: 6178 Yellow
Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole Brick Round 4 x 4...
Part #: 6222 Reddish Brown
Technic Axle 3 with Stud Technic Axle 3 wi...
Part #: 6587 Dark Bluish Gray
Tile 1 x 6 with Groove Tile 1 x 6 with G...
Part #: 6636 Black
Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Technic Rubber Be...
Part #: 85545 Blue
This set is a great source of yellow LEGO bricks and slopes. The inverted slopes are particularly useful for creating unique shapes and details in MOCs.

🛒 Where to Buy

💎 Notable Parts

Yellow Slope Inverted 75° 2 x 1 x 3 (32x) $4.80
Yellow Brick 1 x 6 (26x) $2.60
Yellow Brick 1 x 2 (24x) $2.40
Black Brick Round Corner 2 x 2 Macaroni with Stud Notch (8x) $1.20
Est. BrickLink Part Value
$11.00

💡 MOC Potential

🤖 Giant Plankton Mech
🌳 Bikini Bottom Diorama
🏙 SpongeBob's Pineapple House

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📖 Building Instructions 2

Build-A-Bob Instructions
BUILDING INSTRUCT. 3826 VER29
Download PDF
Build-A-Bob Instructions
BUILDING INSTRUC. 3826 VER 39
Download PDF

Charts Inventory Statistics

94
Unique Parts
441
Total Pieces
1
Minifigures
Inventory Version: 1