How many pieces are in the Ultimate Builders Set?

Ultimate Builders Set contains 321 pieces.

When was the Ultimate Builders Set released?

Ultimate Builders Set was released in 2001.

🏛 RCX

Set #3800

Ultimate Builders Set

The Ultimate Builders Set is a versatile introduction to LEGO Technic.

Before you buy

Who it's for: Beginner build Young builders interested in Technic and robotics
Build: 321 pieces · about 4.5 hours Build time is an estimate.
Availability: Likely retired

★★★☆☆ 3.7 community rating from 10 ratings

Fans appreciate this set as an accessible entry point to LEGO Technic and Mindstorms concepts, though some find the building techniques and model designs quite basic compared to modern sets. Its value lies in its educational potential for younger builders.

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📝 Our Take

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

The Ultimate Builders Set is a versatile introduction to LEGO Technic. Released in 2001 as part of the RCX line, it offers a blend of basic Technic elements and Mindstorms components, encouraging experimentation and learning fundamental building principles.

This set is perfect for young builders eager to explore Technic and robotics. With a manageable piece count and clear instructions, it's an excellent starting point for developing problem-solving and engineering skills through LEGO.

Skip this if you're looking for advanced building techniques or complex models. This set is designed for beginners, so consider sets like the LEGO Technic Monster Jam series for a more challenging build experience.

✨ New

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How does this set compare to modern LEGO Technic starter sets? What are some simple robotic projects that can be built with this set? Is this a good set for learning the basics of LEGO Technic? How does the RCX brick integrate with the Technic components in this set?

🧱 Building Experience

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

🧩

321

Pieces

⏱

4.5h

Estimated Build Time

📊

Beginner

Difficulty

Build Highlights:

Introduction to Technic building principles
Exploration of basic mechanical functions
Integration of Mindstorms elements
Encourages experimentation and creativity

📈 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

C+

Investment Grade

⏳ Retired

The Ultimate Builders Set, while not a flagship product, holds some appeal for collectors interested in the early Mindstorms era. Its relatively low piece count and beginner-friendly design may limit its investment potential compared to larger, more complex sets. However, its age and the nostalgia factor associated with early LEGO robotics could lead to gradual appreciation over time. The presence of Mindstorms-related elements adds a unique aspect that might attract specific collectors. Condition and completeness are key factors in determining its value.

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

⚖ Compare Similar Sets

Monster Jam Grave Digger

Technic • 212 pcs

$19.99

Compared to modern Technic starter sets, the Ultimate Builders Set offers a simpler, more introductory experience. Sets like the LEGO Technic Monster Jam series provide more complex builds and play features, but the Ultimate Builders Set's focus on fundamental principles and Mindstorms integration makes it a unique choice for beginners interested in robotics. Consider the LEGO Boost Creative Toolbox for a more modern robotics learning experience.

📦 Parts Inventory

Official piece count: 321
Parts cataloged in this inventory: 63 unique parts, 322 pieces

LEGO counts 321 pieces. This inventory comes from a separate parts catalog and lists 322; the two do not always count the same elements, so their totals differ. 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.

String Cord Mediu...

Part #: 14728c200 1× Black

Technic Pin with ...

Part #: 2780 20× Black

Pneumatic Cylinde...

Part #: 2793c01 1× Trans-Clear

Plate Special 2 x...

Part #: 2817 4× Light Gray

Technic Beam 1 x ...

Part #: 2825 2× Light Gray

Technic Turntable...

Part #: 2855 1× Trans-Clear

Technic Turntable...

Part #: 2856 1× Black

Technic Beam Tria...

Part #: 2905 2× Blue

Technic Pin 3/4

Part #: 32002 4× Dark Gray

Technic Tread Hub

Part #: 32007 2× White

Technic Reel 3 x 2

Part #: 32012 1× Yellow

Plate Special 1 x...

Part #: 32028 4× Light Gray

Technic Axle Conn...

Part #: 32039 4× Black

Technic Axle Conn...

Part #: 32039 4× Light Gray

Technic Pin Long ...

Part #: 32054 24× Blue

Technic Axle 2 No...

Part #: 32062 5× Black

Technic Axle 5

Part #: 32073 4× Black

Technic Bush 1/2 ...

Part #: 32123a 5× Light Gray

Technic Beam 2 x ...

Part #: 32140 4× Black

Large Figure Thro...

Part #: 32171pr0062 6× Black

Technic Axle and ...

Part #: 32184 4× Blue

Technic Axle and ...

Part #: 32192 2× Black

Technic Gear 20 T...

Part #: 32198 1× Light Gray

Technic Axle 5.5 ...

Part #: 32209 2× White

Technic Beam 3 x ...

Part #: 32250 4× Blue

Technic Gear 20 T...

Part #: 32269 3× Light Gray

Technic Gear 12 T...

Part #: 32270 3× Light Gray

Technic Beam 1 x ...

Part #: 32271 2× Trans-Neon Green

Technic Beam 1 x ...

Part #: 32271 2× Trans-Neon Orange

Technic Beam 1 x ...

Part #: 32278 5× Blue

Technic Beam 1 x ...

Part #: 32278 6× Black

Technic Axle and ...

Part #: 32291 4× Black

Technic Beam 1 x ...

Part #: 32316 8× Blue

Technic Beam 1 x ...

Part #: 32348 2× Blue

Technic Beam 1 x ...

Part #: 32449 4× Blue

Technic Beam 1 x ...

Part #: 32449 4× Black

Technic Beam 1 x ...

Part #: 32523 6× Blue

Technic Beam 1 x ...

Part #: 32524 4× Blue

Technic Beam 3 x ...

Part #: 32526 2× Black

Technic Beam 3 x ...

Part #: 32526 2× Yellow

Technic Pin Conne...

Part #: 32529 2× Black

Technic Pin Conne...

Part #: 32530 6× Black

Technic Brick 4 x...

Part #: 32531 2× Trans-Clear

Technic Brick 6 x...

Part #: 32532 2× Trans-Clear

Tyre 15 x 6 Offse...

Part #: 3641 4× Black

Technic Brick 1 x...

Part #: 3702 4× Black

Technic Axle 10

Part #: 3737 1× Black

Technic Gear Rack...

Part #: 3743 4× Light Gray

Technic Axle Pin ...

Part #: 3749 6× Light Gray

Plate Round 2 x 2...

Part #: 4032a 2× White

CD-Rom, Ultimate ...

Part #: 4153273 1× [No Color/Any Color]

Technic Axle 3

Part #: 4519 5× Black

Hose, Pneumatic 4...

Part #: 5102c195 1× Trans-Clear

Wire with Brick 2...

Part #: 5306bc069 1× Black

Arm Piece with Pi...

Part #: 6048a 4× Black

Plate Round 1 x 1...

Part #: 6141 36× Light Gray

Technic Axle and ...

Part #: 6536 6× Black

Technic Axle Conn...

Part #: 6538b 2× Blue

Technic Brick 1 x...

Part #: 6541 14× Black

Technic Pin Long ...

Part #: 6558 26× Black

Technic Axle 3 wi...

Part #: 6587 4× Dark Gray

Technic Gearbox 2...

Part #: 6588 1× Trans-Clear

Technic Beam 1 x ...

Part #: 6632 4× Black

Technic Beam 1 x ...

Part #: 6632 2× Light Gray

Technic Beam 1 x ...

Part #: 6632 2× Blue

Motor, 9V Mini [O...

Part #: 71427c01 1× Light Gray

Rubber Band Small...

Part #: 71509 4× Black

Pneumatic Pump 1 ...

Part #: 74982 1× Blue

Pneumatic Switch ...

Part #: 75215 1× Light Gray

Technic Pin Conne...

Part #: 75535 4× Black

This set is a good source of basic Technic beams, pins, and connectors, useful for MOC builders looking to create simple mechanical models. The inclusion of Mindstorms printed disks adds a unique touch for collectors interested in the early robotics theme.

🛒 Where to Buy

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💎 Notable Parts

Black Technic Brick 1 x 1 with Pin Hole (14x) $1.40

Black Technic Beam 1 x 15 Thick (6x) $1.20

Black Large Figure Throwing Disk, MindStorms Print (6x) $3.00

Est. BrickLink Part Value

$5.60

💡 MOC Potential

🤖 Simple walking robots with basic functions

🚗 Small, functional vehicles with Technic steering

🚀 Basic rocket models with Technic deployment mechanisms

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

Nonsense Wars reviews the Ultimate Builders Set 3800, noting it as the final expansion for the original Lego Mindstorms, showcasing models like the climber, shooter, and plotter. The reviewer points out the intention for a modular approach, but also observes the projects share fewer modules than expected.