What age is the Mosasaurus recommended for?

This set is recommended for ages 5-12.

When was the Mosasaurus released?

Mosasaurus was released in 2001.

🏛 Dinosaurs

Set #6721

Mosasaurus

Name: Mosasaurus
Brand: LEGO
SKU: 6721-1
Rating: 4.0 (3 reviews)

The Mosasaurus is a charming and nostalgic LEGO set from the Dinosaurs theme.

🏆 Best For: Young children and nostalgic LEGO fans ⏱ 0.5 hr build 🧩 27 pcs 🎂 Ages 5+

★★★☆☆ 3.9 from 3 reviews

Fans appreciate the Mosasaurus for its nostalgic value and simple, yet effective design. While some find the piece count low for the price, the unique Sand Blue color scheme and collectible nature of the set make it a worthwhile addition to any LEGO dinosaur collection.

MSRP

$9.99

Best Price

$8.99

You Save

10% OFF

View on eBay

Check price on Amazon

📝 Our Take

The Mosasaurus is a charming and nostalgic LEGO set from the Dinosaurs theme. Released in 2001, this small set captures the essence of the prehistoric creature with a simple yet effective design, appealing to both young builders and collectors seeking a piece of LEGO history.

This set is perfect for children aged 5-12 and LEGO enthusiasts looking for a quick and engaging build. Its small size and straightforward instructions make it an ideal starter set, while its unique parts and color scheme offer appeal to more experienced builders interested in expanding their collection.

Skip this if you're seeking a highly detailed or complex LEGO experience. This set prioritizes simplicity and playability over intricate design, so consider larger and more elaborate dinosaur-themed sets like the Jurassic Park T. rex Breakout (76956) for a more challenging build.

✨ New

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What makes the Mosasaurus set a good starting point for LEGO collecting? How does this set compare to other dinosaur-themed LEGO sets in terms of design and playability? What are the key factors that contribute to the increasing value of retired LEGO sets like this one? Where is the best place to display this set to highlight its unique features?

🧱 Building Experience

🧩

Pieces

⏱

0.5h

Build Time

📊

Beginner

Difficulty

👤

5-12

Ages

Build Highlights:

Simple and quick build suitable for beginners
Utilizes ball joints for posable limbs and head
Features a unique color scheme with Sand Blue elements
Offers a compact and displayable dinosaur model

📈 Investment Analysis

↑ Trending up since release

Investment Grade

⏳ Appreciating

The Mosasaurus set from 2001 holds moderate investment potential due to its age, rarity, and the enduring popularity of the Dinosaurs theme. While the piece count is low, its retired status and rising price trend suggest increasing demand among collectors. The set's small size makes it easy to store and ship, further enhancing its appeal as a collectible item. However, its value is heavily dependent on condition and completeness, so maintaining a sealed or mint-condition set is crucial for maximizing returns. Compared to larger, more iconic sets, the Mosasaurus may not yield exponential growth, but it represents a stable and appreciating asset within the LEGO secondary market.

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

⚖ Compare Similar Sets

Compared to modern dinosaur sets, the Mosasaurus offers a simpler, more classic LEGO building experience. While sets like the Jurassic Park T. rex Breakout (76956) provide greater detail and complexity, the Mosasaurus stands out for its nostalgic charm and compact size. It's a great alternative for collectors who appreciate vintage LEGO designs or those seeking a smaller, more affordable dinosaur model.

📦 Full Parts Inventory - 19 unique parts • 27 total pieces

Slope 45° 2 x 2

Part #: 3039 2× Dark Gray

Animal Body Part,...

Part #: 40373pr0003 2× Light Gray

Animal Body Part,...

Part #: 40374pr0003 2× Light Gray

Animal / Creature...

Part #: 40375 2× Sand Blue

Animal Body Part ...

Part #: 40378 1× Sand Blue

Animal Body Part ...

Part #: 40379 1× Sand Blue

Animal Body Part,...

Part #: 40380c01pr0003 1× Sand Blue

Animal Body Part,...

Part #: 40384 1× Sand Blue

Animal Body Part,...

Part #: 40385 1× Dark Gray

Animal Body Part,...

Part #: 40386 4× Sand Blue

Animal Body Part,...

Part #: 40387pr0001 1× Sand Blue

Animal Body Part,...

Part #: 40388 1× Light Gray

Animal / Creature...

Part #: 40393 2× Sand Blue

Animal / Creature...

Part #: 40395 1× Sand Blue

Animal / Creature...

Part #: 40396 1× Sand Blue

Packaging Lid, Ca...

Part #: 41342 1× Black

Animal Body Part,...

Part #: 6027 1× Red

Animal / Creature...

Part #: 6127 1× Sand Blue

Animal / Creature...

Part #: 6128 1× Sand Blue

The set is notable for its use of Sand Blue elements, which are relatively uncommon in LEGO sets and can be valuable for MOC builders looking to create aquatic or dinosaur-themed models. The printed Mosasaurus head is a unique and desirable piece for collectors.

🛒 Where to Buy

eBay

✓ In Stock

$8.99 →

Walmart

✓ In Stock

$9.49

Target

✓ In Stock

$9.99

Amazon

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💎 Notable Parts

Sand Blue Animal Body Part, Dinosaur / Whale Flipper with Pin (4x) $1.20

Sand Blue Animal / Creature Body Part, Dinosaur / Dragon Arm, Right (1x) $0.40

Sand Blue Animal / Creature Body Part, Dinosaur / Dragon Arm, Left (1x) $0.40

Sand Blue Animal Body Part, Dinosaur, Head, Small (1x) $0.75

Sand Blue Animal Body Part, Dinosaur, Mosasaurus Head, Toothed with Pin, Dark Gray, Red, and Dark Blue Print (1x) $3.00

Est. BrickLink Part Value

$5.75

💡 MOC Potential

🌳 Aquatic dinosaur diorama with other sea creatures

🚢 Submersible vehicle inspired by the Mosasaurus design

🤖 Mosasaurus-themed robotic creature with articulated limbs

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 8 videos

3.0 /5

Mixed

0% positive

BlockTalk AI

The LEGO Mosasaurus set (6721-1) from 2001 elicits mixed reactions in the LEGO community. While some appreciate its historical significance as part of the original LEGO Dinosaurs line, others, like PythFenn, find the execution disappointing, especially considering the Mosasaurus's iconic status in the Jurassic World franchise.

Lego Jurassic World 72037: Brick-Built Mosasaurus Boat Mission

All New Bricks • 3.1M views Review

I FIXED The MOSASAURUS With FAKE LEGO!!!

Sharky's Fake Bricks • 1.4M views Review

LEGO Dinosaurs Complete 2001 Collection Mosasaurus, T rex, and more

BrickTsar • 153.0K views Review

Community Sentiment

Based on 8 YouTube reviews

Not enough Reddit data

YouTube

3.0 /5

Mixed

0% positive

Positive

Mixed

Critical

BlockTalk AI Analysis

What the Community Says

6 YouTube reviews

BlockTalk AI Summary

Sosnicki Films' review highlights the set within the broader context of the 2001 Dinosaurs Lego collection. Sharky's Fake Bricks focuses on fixing perceived problems with the newer Mosasaurus Boat Mission set, indicating a desire for improvement upon the original design's concept.