How many pieces are in the Robotics Invention System, Version 2.0?

Robotics Invention System, Version 2.0 contains 720 pieces.

What age is the Robotics Invention System, Version 2.0 recommended for?

This set is recommended for ages 18+.

When was the Robotics Invention System, Version 2.0 released?

Robotics Invention System, Version 2.0 was released in 2001.

🏛 RCX

Set #3804

Robotics Invention System, Version 2.0

Name: Robotics Invention System, Version 2.0
Brand: LEGO
SKU: 3804-1
Rating: 4.5 (6 reviews)

The Robotics Invention System 2.

🏆 Best For: Perfect for teens and adults interested in robotics and programming basics ⏱ 4.5 hr build 🧩 720 pcs

★★★★☆ 4.2 from 6 reviews

Fans appreciate this set's historical significance and its introduction to basic robotics concepts. However, some find the RCX brick outdated and prefer the advanced features of newer Mindstorms sets.

MSRP

$199.99

Best Price

$179.99

You Save

10% OFF

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📝 Our Take

The Robotics Invention System 2.0 is a groundbreaking set that sparked a revolution in LEGO robotics. Released in 2001, this set introduced the programmable RCX brick, allowing builders to create interactive and autonomous robots. It's a fantastic blend of classic LEGO building with early-era coding and robotics principles.

This set is perfect for LEGO enthusiasts and budding engineers interested in robotics and programming. The building experience is rewarding, providing a hands-on introduction to creating functional robots. The set offers a great starting point for exploring the world of LEGO Mindstorms.

Skip this if you're looking for modern Mindstorms features or advanced programming capabilities. The RCX brick is dated compared to newer Mindstorms sets like the Robot Inventor (51515-1), which offers smartphone control and a more user-friendly programming interface.

✨ New

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How does the Robotics Invention System 2.0 compare to modern LEGO Mindstorms sets? What are the programming limitations of the RCX brick? Is this set a good introduction to robotics for beginners? How does the price of this set compare to its original MSRP?

🧱 Building Experience

🧩

720

Pieces

⏱

4.5h

Build Time

📊

Intermediate

Difficulty

Build Highlights:

Programmable RCX brick allows for basic autonomous functions
Introduction to sensor technology (touch and light sensors)
Building a variety of robotic models with different functionalities
Exploring basic programming concepts through the RCX interface

📈 Investment Analysis

↑ Trending up since release

Investment Grade

⏳ Appreciating

The Robotics Invention System 2.0 holds moderate investment potential due to its historical significance in the LEGO Mindstorms line. As one of the earliest programmable LEGO sets, it appeals to collectors interested in the evolution of LEGO robotics. While not as sought after as some of the later Mindstorms versions, its age and the nostalgia factor contribute to its value. The rising price trend suggests increasing collector interest. However, the technological limitations of the RCX brick compared to modern Mindstorms 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

⚖ Compare Similar Sets

Robot Inventor

Mindstorms • 949 pcs

$359.99

Mindstorms Education Base Set

Compared to modern Mindstorms sets like the Robot Inventor (51515-1), the Robotics Invention System 2.0 offers a simpler, more basic approach to robotics. While the newer sets offer more advanced technology and features, the 3804-1 provides a nostalgic and historically significant experience. If you're interested in the history of LEGO robotics, the 3804-1 is a great choice. If you want the latest technology, go for the 51515-1.

📦 Full Parts Inventory - 132 unique parts • 687 total pieces

Transmitter Tower...

Part #: 23319c01 1× Dark Gray

Tyre 30 x 10.5 Of...

Part #: 2346 4× Black

Wedge Plate 3 x 6...

Part #: 2419 2× Green

Plate 2 x 2 Corner

Part #: 2420 8× Light Gray

Plate Round 2 x 2...

Part #: 2654 2× Black

Technic Brick 1 x...

Part #: 2730 8× Black

Technic Pin with ...

Part #: 2780 1× Black

Technic Wedge Bel...

Part #: 2815 2× Black

Plate Special 2 x...

Part #: 2817 4× Light Gray

Technic Beam 1 x ...

Part #: 2825 2× Light Gray

Technic Engine Cr...

Part #: 2854 2× Light Gray

Tyre 81.6 x 15 Mo...

Part #: 2902 4× Black

Wheel 61.6 x 13.6...

Part #: 2903 4× White

Sensor, Light wit...

Part #: 2982c01 1× Blue

Motor Pulley, 9V ...

Part #: 2983 2× Light Gray

Wheel Rim 24 x 14...

Part #: 2994 2× White

Brick 2 x 4

Part #: 3001 5× Black

Brick 2 x 2

Part #: 3003 20× Black

Brick 1 x 2

Part #: 3004 20× Black

Brick 1 x 2

Part #: 3004 4× Yellow

Plate 2 x 4

Part #: 3020 6× Yellow

Plate 2 x 2

Part #: 3022 4× Blue

Plate 2 x 2

Part #: 3022 8× Light Gray

Plate 2 x 2

Part #: 3022 2× Green

Plate 1 x 2

Part #: 3023 20× Light Gray

Plate 1 x 1

Part #: 3024 8× Light Gray

Plate 6 x 10

Part #: 3033 1× Light Gray

Plate 2 x 8

Part #: 3034 4× Green

Slope 45° 2 x 1 w...

Part #: 3040b 4× Yellow

Slope 45° 2 x 1 w...

Part #: 3040b 12× Black

Technic Plate 2 x...

Part #: 32001 4× Light Gray

Technic Pin 3/4

Part #: 32002 16× Dark Gray

Technic Tread Hub

Part #: 32007 4× White

Technic Beam 1 x ...

Part #: 32009 4× Yellow

Technic Axle and ...

Part #: 32013 4× Blue

Technic Axle and ...

Part #: 32015 4× Light Gray

Technic Beam 1 x ...

Part #: 32017 4× Light Gray

Plate Special 1 x...

Part #: 32028 8× Light Gray

Technic Axle and ...

Part #: 32034 2× Blue

Technic Axle Conn...

Part #: 32039 2× Light Gray

Technic Pin Long ...

Part #: 32054 4× Blue

Technic Beam 3 x ...

Part #: 32056 4× Light Gray

Technic Axle 2 No...

Part #: 32062 10× Black

Technic Brick 1 x...

Part #: 32064c 4× Green

Technic Beam 1 x ...

Part #: 32065 4× Black

Technic Axle and ...

Part #: 32068 2× Light Gray

Technic Axle 5

Part #: 32073 2× Black

Technic Bush 1/2 ...

Part #: 32123a 18× Light Gray

Technic Modular C...

Part #: 32137 4× Trans-Dark Blue

Technic Pin Doubl...

Part #: 32138 2× Yellow

Technic Beam 2 x ...

Part #: 32140 2× Black

Plate 1 x 8

Part #: 3460 8× Light Gray

Wheel with Split ...

Part #: 3482 6× Yellow

Tyre Offset Tread...

Part #: 3483 2× Black

Plate 1 x 3

Part #: 3623 2× Yellow

Tyre 43 x 17

Part #: 3634 2× Black

Technic Gear 8 Tooth

Part #: 3647 1× Light Gray

Technic Gear 24 T...

Part #: 3648b 4× Light Gray

Technic Gear 40 T...

Part #: 3649 4× Light Gray

Technic Gear 24 T...

Part #: 3650c 4× Light Gray

Slope Inverted 45...

Part #: 3665 4× Yellow

Slope Inverted 45...

Part #: 3665 4× Black

Plate 1 x 6

Part #: 3666 10× Light Gray

Technic Pin witho...

Part #: 3673 24× Light Gray

Turntable 2 x 2 P...

Part #: 3679 2× Light Gray

Turntable 2 x 2 P...

Part #: 3680 2× Blue

Technic Brick 1 x...

Part #: 3700 4× Yellow

Technic Brick 1 x...

Part #: 3700 12× Black

Technic Brick 1 x...

Part #: 3701 2× Green

Technic Brick 1 x...

Part #: 3701 10× Black

Technic Brick 1 x...

Part #: 3702 8× Black

Technic Brick 1 x...

Part #: 3703 6× Black

Technic Axle 4

Part #: 3705 7× Black

Technic Axle 6

Part #: 3706 8× Black

Technic Axle 8

Part #: 3707 7× Black

Technic Axle 12

Part #: 3708 2× Black

Technic Plate 2 x...

Part #: 3709 4× Light Gray

Plate 1 x 4

Part #: 3710 10× Light Gray

Technic Bush

Part #: 3713 40× Light Gray

Technic Steering ...

Part #: 3736 2× Light Gray

Technic Axle 10

Part #: 3737 4× Black

Technic Plate 2 x...

Part #: 3738 8× Light Gray

Technic Gear Rack...

Part #: 3743 4× Light Gray

Slope Inverted 33...

Part #: 3747a 4× Black

Technic Axle Pin ...

Part #: 3749 16× Light Gray

Plate 2 x 10

Part #: 3832 6× Light Gray

Technic Brick 1 x...

Part #: 3894 8× Black

Technic Brick 1 x...

Part #: 3895 6× Black

Brick Round 2 x 2...

Part #: 3941 8× Black

Bracket 2 x 2 - 2...

Part #: 3956 2× Light Gray

Dish 4 x 4 Invert...

Part #: 3960 2× White

Cable, Fiber Opti...

Part #: 40002c25 1× Trans-Clear

Technic Gear 16 T...

Part #: 4019 4× Light Gray

Plate Round 2 x 2...

Part #: 4032a 2× Blue

Plate Round 2 x 2...

Part #: 4032a 2× White

Plate Special 1 x...

Part #: 4085c 2× Black

CD-Rom, for 3804 ...

Part #: 4142876 1× [No Color/Any Color]

Playmat, Test Mat...

Part #: 4153678 1× [No Color/Any Color]

Technic Wedge Bel...

Part #: 4185 4× Light Gray

Arm Grab Jaw Hold...

Part #: 4220 2× Yellow

Arm Grab Jaw

Part #: 4221 4× Black

Technic Pin 1/2

Part #: 4274 8× Light Gray

Hinge Plate 1 x 2...

Part #: 4275b 2× Black

Plate 1 x 10

Part #: 4477 6× Light Gray

Technic Axle 3

Part #: 4519 3× Black

Hinge Tile 1 x 2 ...

Part #: 4531 2× Black

Cone 1 x 1 [No To...

Part #: 4589 2× White

Cone 1 x 1 [No To...

Part #: 4589 2× Yellow

Technic Worm Gear

Part #: 4716 2× Black

Wire with Brick 2...

Part #: 5306bc020 4× Black

Wire with Brick 2...

Part #: 5306bc162 2× Black

Brick Separator v1.0

Part #: 6007 1× Dark Gray

Plate Special 1 x...

Part #: 6019 2× Black

Arm Piece with Pi...

Part #: 6048a 2× Black

Creature Body Par...

Part #: 6133 2× Trans-Neon Orange

Plate Round 1 x 1...

Part #: 6141 1× Black

Plate Round 1 x 1...

Part #: 6141 1× White

Plate Round 1 x 1...

Part #: 6141 2× Blue

Technic Axle and ...

Part #: 6536 6× Light Gray

Technic Axle Conn...

Part #: 6538b 4× Light Gray

Technic Axle 1.5 ...

Part #: 6553 2× Light Gray

Technic Pin Long ...

Part #: 6558 8× Black

Technic Gear Diff...

Part #: 6573 1× Dark Gray

Technic Cam

Part #: 6575 2× Light Gray

Tyre 30.4 x 14 VR

Part #: 6578 2× Black

Technic Axle 3 wi...

Part #: 6587 2× Dark Gray

Technic Gear 12 T...

Part #: 6589 5× Light Gray

Tyre 49.6 x 28 VR

Part #: 6594 2× Black

Wheel 49.6 x 28 V...

Part #: 6595 2× White

Technic Beam 1 x ...

Part #: 6629 4× Black

Technic Beam 1 x ...

Part #: 6632 4× Light Gray

Tread Large, Tech...

Part #: 71372 2× Black

Motor, 9V Mini [O...

Part #: 71427c01 2× Light Gray

Rubber Band Small...

Part #: 71509 1× Black

Hose Rigid 3mm D....

Part #: 75c19 2× Yellow

Technic Gear 24 T...

Part #: 76019 1× White

Hose, Ribbed 7mm ...

Part #: 78c09 4× Black

Hose, Ribbed 7mm ...

Part #: 78c09 4× Dark Turquoise

Hose, Ribbed 7mm ...

Part #: 78c12 4× Purple

Rubber Belt Small...

Part #: 85543 3× White

Technic Rubber Be...

Part #: 85545 3× Blue

Technic Rubber Be...

Part #: 85546 3× Yellow

Sensor, Touch

Part #: 879 2× Light Gray

Hub, RCX 2.0, No ...

Part #: 884c 1× Yellow

The set features a good selection of Technic parts, especially pins and bushes, useful for creating functional mechanisms. The abundance of light gray elements can be beneficial for builders looking to expand their Technic collection.

🛒 Where to Buy

eBay

✓ In Stock

$179.99 →

Walmart

✓ In Stock

$189.99

Target

✓ In Stock

$199.99

Amazon

Check price

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💎 Notable Parts

Light Gray Technic Bush (40x) $2.00

Light Gray Technic Pin without Friction Ridges Lengthwise (24x) $1.20

Black Technic Brick 1 x 8 [7 Pin Holes] (8x) $0.80

Black Technic Brick 1 x 10 [9 Pin Holes] (8x) $0.80

Est. BrickLink Part Value

$4.80

💡 MOC Potential

🤖 Advanced walking robots with obstacle avoidance

🚗 Autonomous vehicles with sensor-based navigation

🏛 Automated LEGO sorting machine

🌳 Robotic plant watering system

📰 RCX News

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 7 videos

3.0 /5

Mixed

0% positive

BlockTalk AI

Reviews of the LEGO Mindstorms Robotics Invention System Version 2.0 (3804-1) are largely neutral, often focusing on unboxing, demonstrating older versions, or providing buying advice for used sets. Reviewers like BatteryPoweredBricks share their experiences acquiring new and used sets, highlighting the uncertainty of buying used LEGO Mindstorms online.

Lego Mindstorms Review - Part 2 - RUG Community Robot Review

rugcommunity • 14.6K views Review

PSA buying used Lego Mindstorms - How not to get hosed

BatteryPoweredBricks • 4.2K views Review

Computer Chronicles: LEGO MINDSTORMS

Tech Perspectives • 2.8K views Review

Community Sentiment

Based on 7 YouTube reviews

Not enough Reddit data

YouTube

3.0 /5

Mixed

0% positive

Positive

Mixed

Critical

BlockTalk AI Analysis

What the Community Says

5 YouTube reviews

BlockTalk AI Summary

Doug's Devices discusses using older LEGO Mindstorms with modern computers, mentioning the potential need for a USB IR tower due to serial port limitations. Nonsense Wars offers reviews of both the Robotics Invention System 2.0 and the Ultimate Builders Set, encouraging viewers to like and subscribe for more content.

Reddit Reviews

No Reddit reviews found

YouTube Reviews

5 videos

Lego Mindstorms Review - Part 2 - RUG Community Robot Review

rugcommunity

14.6K views Review

PSA buying used Lego Mindstorms - How not to get hosed

BatteryPoweredBricks

4.2K views Review

Computer Chronicles: LEGO MINDSTORMS

Tech Perspectives

2.8K views Review

I've turned to the darkside... of Lego Mindstorms

BatteryPoweredBricks

1.6K views Review

View all 5 on YouTube

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

📖 Building Instructions 1

BUILDING INSTR. 3804 ENG/US

Download PDF

Included In These Sets

This set is packaged within the following gift sets and value packs

Inventory Statistics

132

Unique Parts

687

Total Pieces

Minifigures

Inventory Version: 1

Unlock Your Inner Engineer!
Build the Robotics Invention System 2.0

Robotics Invention System, Version 2.0

📝 Our Take

Ask BlockTalk about this set

🧱 Building Experience

📈 Investment Analysis

⚖ Compare Similar Sets

📦 Full Parts Inventory - 132 unique parts • 687 total pieces

🛒 Where to Buy

💎 Notable Parts

💡 MOC Potential

📰 RCX News

LEGO Star Wars set 3803