Unleash the Beast!
The Monster Jam Dragon is here!

Build this fierce 217-piece LEGO Technic set and dominate the Monster Jam arena! Then rebuild it into a Crocodile Buggy for even more action.

🏛 Technic
Set #42149

Monster Jam Dragon

The Monster Jam Dragon is a roaring good time in a small package.

Before you buy

Who it's for
Ages 7+ · Beginner build Kids aged 7+ interested in Monster Jam and simple Technic builds
Build
217 pieces · about 1.5 hours Build time is an estimate.
Price
$19.99 list price · 9.2¢ per piece
Availability
Retired at LEGO
★★★☆☆ 3.6 community rating from 49 ratings

Fans appreciate the set's vibrant design and easy-to-use pull-back motor. However, some feel the build is too simple for experienced Technic builders and the overall size is small for the price.

📝 Our Take

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

The Monster Jam Dragon is a roaring good time in a small package. This Technic set brings the excitement of Monster Jam to life with its pull-back motor and fearsome dragon design, making it a fun and engaging build for younger LEGO enthusiasts.

This set is perfect for kids and Monster Jam fans. The build is relatively quick and straightforward, making it an ideal introduction to Technic sets. The pull-back motor adds a fun play feature, allowing kids to recreate their favorite Monster Jam stunts.

Skip this if you're looking for a complex Technic build or a highly detailed display model. For a more challenging build, consider larger Technic sets like the Monster Jam Grave Digger 42118-1.

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How does the pull-back motor work in this set? Is this a good introduction to Technic building for kids? How does this set compare to other Monster Jam LEGO sets? What kind of stunts can you perform with this truck?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI
🧩
217
Pieces
⏱
1.5h
Estimated Build Time
📊
Beginner
Difficulty
📏
12cm × 19cm × 11cm
Dimensions
Build Highlights:
  • Simple and straightforward Technic build
  • Features a pull-back motor for action-packed play
  • Colorful design with dragon-themed elements
  • Durable construction for rough play

📈 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 Monster Jam Dragon is a lower-priced Technic set, which may limit its investment potential compared to larger, more complex models. However, the Monster Jam license has a dedicated fan base, and the set's affordability could make it appealing to collectors seeking complete theme collections. Its small size and piece count mean it's less likely to command a high premium in the future, but it could hold its value or see a modest increase over time, especially if well-preserved and in its original packaging. Consider the relatively low piece count (217) when assessing its long-term appreciation potential. Sets with higher piece counts and more unique elements tend to perform better as investments.

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

⚖ Compare Similar Sets

This set is a smaller, more affordable entry point into the LEGO Technic Monster Jam lineup. Compared to the larger Monster Jam Grave Digger (42118-1), it offers a simpler build and lower price point, making it ideal for younger builders or those on a budget. While it lacks the complexity and detail of larger sets, its pull-back motor and dragon design provide a fun and engaging play experience.

📦 Parts Inventory

Official piece count
217
Parts cataloged in this inventory
51 unique parts, 217 pieces
Sticker Sheet for Set 42149-1 Sticker Sheet for...
Part #: 10102450 1× [No Color/Any Color]
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Technic Axle Pin ...
Part #: 11214 2× Dark Bluish Gray
Technic Panel Fairing #21 5L Small Smooth, Side B Technic Panel Fai...
Part #: 11946 1× Green
Technic Panel Fairing #22 5L Small Smooth, Side A Technic Panel Fai...
Part #: 11947 1× Green
Pullback Motor 6 x 3 x 5 Pullback Motor 6 ...
Part #: 12799 1× Dark Bluish Gray
Technic Pin Connector Round 1L [Beam] Technic Pin Conne...
Part #: 18654 6× Black
Technic Panel Fairing #7 3L Very Small Smooth, Side A Technic Panel Fai...
Part #: 2387 2× Green
Technic Panel Fairing #8 3L Very Small Smooth, Side B Technic Panel Fai...
Part #: 2389 2× Green
Technic Beam 1 x 7 Thick with Alternating Holes Technic Beam 1 x ...
Part #: 2391 4× Green
Technic Panel Fairing #9 Medium Triangle Smooth Technic Panel Fai...
Part #: 2395 1× Green
Technic Panel Fairing #10 Medium Triangle Smooth Technic Panel Fai...
Part #: 2403 1× Green
Technic Pin Connector Hub with 2 Axles Technic Pin Conne...
Part #: 27940 1× Dark Bluish Gray
Technic Axle and Pin Connector Angled #1 Technic Axle and ...
Part #: 32013 3× Green
Technic Axle 2 Notched Technic Axle 2 No...
Part #: 32062 6× Red
Technic Beam 1 x 6 Thin Technic Beam 1 x ...
Part #: 32063 4× Black
Technic Axle 5 Technic Axle 5
Part #: 32073 3× Yellow
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Technic Bush 1/2 ...
Part #: 32123b 4× Light Bluish Gray
Technic Beam 2 x 4 L-Shape Thick Technic Beam 2 x ...
Part #: 32140 6× Black
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Technic Axle and ...
Part #: 32184 2× Light Bluish Gray
Technic Axle and Pin Connector Angled #4 - 135° Technic Axle and ...
Part #: 32192 2× Green
Technic Beam 1 x 15 Thick Technic Beam 1 x ...
Part #: 32278 2× Green
Technic Beam 1 x 7 Thick Technic Beam 1 x ...
Part #: 32524 2× Dark Bluish Gray
Technic Beam 1 x 11 Thick Technic Beam 1 x ...
Part #: 32525 2× Dark Bluish Gray
Technic Beam 3 x 5 L-Shape Thick Technic Beam 3 x ...
Part #: 32526 2× Green
Technic Axle 12 Technic Axle 12
Part #: 3708 2× Black
Technic Bush Technic Bush
Part #: 3713 5× Light Bluish Gray
Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End Section Animal Body Part ...
Part #: 40379 2× Red
Technic Beam 1 x 9 Thick Technic Beam 1 x ...
Part #: 40490 1× Green
Technic Beam 1 x 9 Thick Technic Beam 1 x ...
Part #: 40490 2× Black
Technic Beam 1 x 13 Thick Technic Beam 1 x ...
Part #: 41239 3× Black
Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Technic Pin Long ...
Part #: 42924 20× Blue
Technic Axle Pin with Friction Ridges Lengthwise Technic Axle Pin ...
Part #: 43093 11× Blue
Technic Axle 7 Technic Axle 7
Part #: 44294 4× Light Bluish Gray
Technic Axle 3 Technic Axle 3
Part #: 4519 4× Light Bluish Gray
Animal Body Part / Plant, Tail / Neck / Branch / Trunk, Middle Section with Pin, Square Pin Hole Animal Body Part ...
Part #: 51274 2× Red
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Animal Body Part,...
Part #: 53451 12× Tan
Tyre 56 x 26 Balloon Tyre 56 x 26 Balloon
Part #: 55976 4× Black
Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Wheel 30.4 x 20 w...
Part #: 56145 4× Orange
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Technic Beam 1 x ...
Part #: 60483 4× Black
Technic Beam 3 x 3 T-Shape Thick Technic Beam 3 x ...
Part #: 60484 2× Black
Technic Pin with Friction Ridges Lengthwise with No Center Slots Technic Pin with ...
Part #: 61332 38× Black
Technic Pin Connector Round [Slotted] Technic Pin Conne...
Part #: 62462 2× Light Bluish Gray
Technic Axle and Pin Connector Perpendicular Triple Technic Axle and ...
Part #: 63869 3× Black
Technic Panel Fairing # 4 Small Smooth Long, Side B Technic Panel Fai...
Part #: 64391 2× Green
Technic Panel Fairing # 3 Small Smooth Long, Side A Technic Panel Fai...
Part #: 64683 2× Green
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole] Technic Pin Long ...
Part #: 65304 3× Black
Technic Axle and Pin Connector Perpendicular Technic Axle and ...
Part #: 6536 2× Light Bluish Gray
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Technic Pin Conne...
Part #: 65487 2× Red
Technic Beam 1 x 9 Bent (6 - 4) Thick Technic Beam 1 x ...
Part #: 6629 2× Green
Technic Beam 1 x 9 Bent (6 - 4) Thick Technic Beam 1 x ...
Part #: 6629 2× Black
Technic Axle and Pin Connector Perpendicular Double Split [Reinforced] Technic Axle and ...
Part #: 69819 2× Black
Hose, Ribbed 7mm D. 3L / 2.4cm Hose, Ribbed 7mm ...
Part #: 78c03 4× Flat Silver
Technic Pin 1/2 with Friction Technic Pin 1/2 w...
Part #: 89678 10× Red
The set contains a good selection of Technic pins and axles, useful for MOC builders looking to add functionality to their creations. The tan animal claws are also a nice addition for creating creatures and monsters.

💎 Notable Parts

Blue Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot (20x) $1.00
Tan Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small (12x) $1.80
Black Tyre 56 x 26 Balloon (4x) $4.00
Orange Wheel 30.4 x 20 without Pinholes, with Reinforced Rim (4x) $2.00
Est. BrickLink Part Value
$8.80

💡 MOC Potential

🚗 Alternate Monster Truck designs
🤖 Dragon-themed robot or creature
🚗 Other pull-back motor vehicles

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

2 videos found
BlockTalk AI

The LEGO Technic Monster Jam Dragon (42149) receives generally positive feedback from LEGO YouTubers. Reviewers like MyBrickTime appreciate its dragon details, pull-back action, and the option to rebuild it into the Crocodile Buggy. The set's toughness and suitability for rough surfaces are also highlighted.

What the Community Says

2 YouTube reviews
BlockTalk AI Summary

Taulandia's unboxing and speed builds showcase both the primary Monster Jam Dragon and the alternate Crocodile Buggy build. MyBrickTime emphasizes the playability and design aspects, mentioning the dragon's spikes and horns and the availability of online instructions for the B model.

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

📖 Building Instructions 4

Monster Jam Dragon Instructions
42149_01_BI_Build_Alt
Download PDF
Monster Jam Dragon Instructions
BI 3101, 64+4, 42149 V29
Download PDF
Monster Jam Dragon Instructions
BI 3101, 64+4, 42149 V39
Download PDF
Monster Jam Dragon Instructions
BI 3101, 64+4, 42149 V29
Download PDF

Charts Inventory Statistics

51
Unique Parts
217
Official Piece Count
217
Cataloged Inventory Pieces
0
Minifigures
6
Spare Parts
Inventory Version: 1

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