How many pieces are in the Kai's Mech Jet?

Kai's Mech Jet contains 226 pieces.

What age is the Kai's Mech Jet recommended for?

This set is recommended for ages 7+.

When was the Kai's Mech Jet released?

Kai's Mech Jet was released in 2020.

1 / 5

🏛 Ninjago

Set #71707

Kai's Mech Jet

Name: Kai's Mech Jet
Brand: LEGO
SKU: 71707-1
Rating: 3.7 (3 reviews)

Kai's Mech Jet is a fun, versatile 2-in-1 set.

🏆 Best For: Ideal for children aged 7+ who enjoy Ninjago and simple mech builds ⏱ 2.0 hr build 🧩 226 pcs 🎂 Ages 7+

★★★☆☆ 3.7 from 3 reviews

Fans appreciate the 2-in-1 build and the inclusion of two minifigures, making it a good value for play. However, some find the mech design somewhat simplistic and lacking in articulation compared to larger Ninjago mechs.

MSRP

$19.99

Best Price

$17.99

You Save

10% OFF

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📝 Our Take

Kai's Mech Jet is a fun, versatile 2-in-1 set. This Ninjago set offers two distinct building experiences, allowing kids to create either a mech or a jet, providing extended play value and creative options.

This set is perfect for young Ninjago enthusiasts and beginner LEGO builders. With a manageable piece count and clear instructions, it's an accessible and engaging build that encourages imaginative play and storytelling.

Skip this if you're an advanced builder looking for a complex and challenging project. This set is geared towards a younger audience, so consider larger Ninjago sets like the Fire Stone Mech (71720) for a more intricate build.

✨ New

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How does this set compare to other Ninjago mech sets in terms of size and playability? What are some creative ways to combine this set with other Ninjago sets for expanded play? Is this set a good value for the price, considering its piece count and minifigures? How durable is the built model for active play?

🧱 Building Experience

🧩

226

Pieces

⏱

2.0h

Build Time

📊

Beginner

Difficulty

👤

Ages

Build Highlights:

Two-in-one build offers variety and replayability.
Simple Technic connections add stability to the mech.
Bright color scheme is visually appealing.
Easy-to-follow instructions make it a great starter set.

📈 Investment Analysis

↑ Trending up since release

C+

Investment Grade

⏳ Appreciating

Kai's Mech Jet presents a moderate investment opportunity. As a retired Ninjago set, it benefits from the theme's enduring popularity. However, the relatively low piece count and initial MSRP may limit substantial appreciation. The rising price trend suggests some collector interest, but its long-term value will depend on maintaining demand within the Ninjago fan base. Compared to larger, more exclusive Ninjago sets, its investment potential is less pronounced, making it a more speculative hold.

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

📖 About This Set

Kai’s Mech Jet (71707) is the ideal birthday gift for kids who love LEGO® NINJAGO® Mechs and Toy Planes. This is a 2-in-1 toy playset, which increases building and play possibilities. Kids can choose for it to be a toy jet plane or a mech toy for exciting adventures in Prime Empire with NINJAGO Kai.The fun new way to build LEGO giftsInstructions PLUS offers an interactive guide to build this toy jet and mech toy and makes it even more fun. Available in the free LEGO Life app; it has zoom and rotate viewing tools to help youngsters build independently. The perfect guide to create this toy playset.The best building kits for kidsLEGO NINJAGO buildable toys let kids enter a mystical world where they can indulge in imaginative play as a team of mini ninjas take on the forces of evil. Kids will be completely enthralled as they role-play with toy jets, NINJAGO Mechs, speeders, dragons and temples.

Brilliant LEGO® NINJAGO® building kit for kids featuring Kai’s Mech Jet. This toy playset will be adored by kids who love buildable toys and creating exciting stories with NINJAGO figures and mech toys.
This building set includes a NINJAGO® Mech that rebuilds into a toy plane, 2 minifigures: NINJAGO® Kai and Richie, and a Key-Tana. Together they will fuel kids' creativity as they re-enact scenes from Prime Empire.
New for January 2020, this toy jet plane creates a world of possibilitiesas it can also be rebuilt into a powerful mech toy with posable arms and legs and shoot studs.
This 217-piece action toy is a rewarding build for boys and girls aged 7+ and makes a great holiday gift. The awesome building set will inspire kids to embrace imaginative play as they bring to life their favorite ninjas.
LEGO® NINJAGO® Mech action toys are the perfect size to play with at home or take with you for fun on the go. The mech measures over 6” (16 cm) high and 9” (25 cm) wide.
No batteries are required for this construction toy – it’s simply fueled by kids’ vivid imaginations, so you never need to leave the NINJAGO® realm.
The perfect ninja playset to give to a young LEGO® builder. The bricks and buildable figures come with paper instructions, as well as the amazing digital and interactive Instructions Plus guide on the free LEGO Life app.
LEGO® NINJAGO® collectible buildable toys let kids enter a thrilling world of fantasy action and create stories with their favorite ninjas as they take on the forces of evil.
LEGO® bricks have met the highest industry standards for more than 60 years, ensuring they are always consistent, compatible and easily pull apart every time. LEGO always delivers quality here on Earth or in the action-packed NINJAGO® realm.
These LEGO® bricks and pieces have been relentlessly tested and meet the highest global safety and quality standards. With LEGO playsets, you always have your peace of mind.

⚖ Compare Similar Sets

Storm Fighter Battle

Ninjago • 165 pcs

$14.99

Empire Temple of Madness

Kai's Mech Jet is a smaller, more affordable entry point into the Ninjago mech line compared to sets like the Fire Stone Mech (71720). While it lacks the complexity and size of larger sets, its 2-in-1 design offers more immediate play options than some single-model sets. It's a good choice for younger builders or those seeking a quick and engaging build without a significant investment.

2 Minifigures Included

Richie - Black Katana Holder

5 parts

Kai / Digi Kai with Shoulder Armor

5 parts

B+

The set includes Digi Kai with shoulder armor, a unique variant of the character, and Richie, providing both a hero and villain for play scenarios. These minifigures add to the set's playability and collectibility.

📦 Full Parts Inventory - 90 unique parts • 205 total pieces

Plate Special 2 x...

Part #: 10247 2× Black

Tile Special 2 x ...

Part #: 11203 2× Black

Bracket 5 x 2 x 1...

Part #: 11215 1× Black

Slope Curved 2 x ...

Part #: 11477 6× Red

Plate Special 1 x...

Part #: 14417 2× Dark Bluish Gray

Plate Special 1 x...

Part #: 14704 4× Light Bluish Gray

Slope Curved 2 x ...

Part #: 15068 2× White

Plate Special 1 x...

Part #: 15070 2× White

Launcher Trigger,...

Part #: 15392 1× Dark Bluish Gray

Launcher, Plate S...

Part #: 15403 2× Black

Tile Round 2 x 2 ...

Part #: 15535 1× Black

Tile Special 1 x ...

Part #: 15712 1× Black

Technic Axle Pin ...

Part #: 18651 2× Black

Plate Special 1 x...

Part #: 18677 2× Black

Weapon Sword / Ka...

Part #: 21459 1× Yellowish Green

Weapon Sword / Ka...

Part #: 21459 2× Orange

Plate Special 1 x...

Part #: 22890 2× Dark Bluish Gray

Part #: 24316 2× Reddish Brown

Plate Special 1 x...

Part #: 2540 2× Dark Bluish Gray

Equipment Boomerang

Part #: 25892 1× White

Wedge Plate 2 x 2...

Part #: 26601 2× Dark Red

Weapon Pike / Spe...

Part #: 27257 1× Trans-Neon Orange

Technic Pin with ...

Part #: 2780 1× Black

Brick Special 1 x...

Part #: 30136 3× Dark Bluish Gray

Plate Special / S...

Part #: 30166 2× Dark Red

Plate 2 x 4

Part #: 3020 5× Red

Plate 2 x 3

Part #: 3021 1× Dark Bluish Gray

Plate 2 x 2

Part #: 3022 2× White

Plate 1 x 2

Part #: 3023 10× Coral

Bar 4L (Lightsabe...

Part #: 30374 1× Trans-Neon Green

Bar 4L (Lightsabe...

Part #: 30374 1× Trans-Neon Orange

Arm Mechanical wi...

Part #: 30377 2× White

Slope 45° 2 x 1 w...

Part #: 3040b 2× Red

Brick Round 1 x 1...

Part #: 3062b 1× Trans-Clear

Technic Brick 1 x...

Part #: 32000 2× Black

Part #: 32064a 4× White

Slope Curved 2 x ...

Part #: 32803 3× Black

Plate Special 1 x...

Part #: 35480 5× Dark Bluish Gray

Plate 1 x 6

Part #: 3666 2× Black

Plate 1 x 4

Part #: 3710 3× Red

Technic Bush

Part #: 3713 2× Light Bluish Gray

Weapon Sword Curv...

Part #: 37341a 2× Trans-Neon Green

Weapon Dagger / K...

Part #: 37341b 2× Trans-Neon Green

Weapon Sword Blad...

Part #: 37341c 2× Trans-Neon Green

Weapon Scythe / H...

Part #: 37341d 2× Trans-Neon Green

Weapon Scythe / H...

Part #: 37341e 2× Trans-Neon Green

Plate 2 x 6

Part #: 3795 1× Black

Plate 2 x 10

Part #: 3832 1× Light Bluish Gray

Brick Round 2 x 2...

Part #: 3941 1× Trans-Neon Orange

Plate Round 2 x 2...

Part #: 4032a 1× Black

Plate Round 2 x 2...

Part #: 4032a 2× White

Part #: 44676 2× White

Technic Axle 3

Part #: 4519 3× Light Bluish Gray

Dish 2 x 2 Invert...

Part #: 4740 1× Trans-Clear

Part #: 47456 2× White

Brick Curved 2 x ...

Part #: 47457 1× Light Bluish Gray

Wedge Curved 4 x ...

Part #: 47753 2× Red

Plate Special 1 x...

Part #: 48336 3× White

Plate Special 1 x...

Part #: 49668 2× Black

Wedge Plate 2 x 4

Part #: 51739 3× White

Wedge Plate 2 x 4

Part #: 51739 2× Red

Technic Ball Join...

Part #: 53585 4× Black

Technic Axle Conn...

Part #: 57585 2× Light Bluish Gray

Technic Axle Conn...

Part #: 59443 2× Dark Bluish Gray

Plate Special 1 x...

Part #: 60470b 3× Red

Plate Special 1 x...

Part #: 60897 2× Black

Slope 18° 2 x 1 x...

Part #: 61409 4× Black

Plate Round 1 x 1...

Part #: 6141 1× Trans-Neon Green

Plate Round 1 x 1...

Part #: 6141 1× Trans-Neon Orange

Large Figure Wing...

Part #: 61800 2× White

Wedge Curved 4 x ...

Part #: 64225 1× White

Game Controller /...

Part #: 65080pat0001 1× White

Game Controller /...

Part #: 65080pat0002 1× Black

Large Figure Weap...

Part #: 65184 3× Trans-Neon Green

Minifig Gameplaye...

Part #: 65191pr0001 1× Trans-Neon Green

Minifig Gameplaye...

Part #: 65191pr0002 1× Trans-Neon Orange

Weapon Sword with...

Part #: 65272pat0002 1× White

Part #: 66646 1× [No Color/Any Color]

Hinge Plate 1 x 4...

Part #: 73983 4× Light Bluish Gray

Sports Surfboard ...

Part #: 90397 1× Lime

Technic Brick Spe...

Part #: 92013 4× Black

Bracket 1 x 2 - 2...

Part #: 93274 2× Black

Tile Special 1 x ...

Part #: 99563 5× White

Bracket 1 x 2 - 1...

Part #: 99780 2× Red

Bracket 1 x 2 - 1...

Part #: 99781 4× Black

The set features a good selection of red and black pieces, useful for building mechs and vehicles. The trans-neon green sword elements are a standout, adding a vibrant energy effect to builds.

🛒 Where to Buy

eBay

✓ In Stock

$17.99 →

LEGO (UK)

✓ In Stock

£17.99

Walmart

✓ In Stock

$18.99

Target

✓ In Stock

$19.99

LEGO (DE)

✓ In Stock

€19.99

LEGO (US)

✓ In Stock

$19.99

LEGO (CA)

✓ In Stock

$24.99

Amazon

Check price

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💎 Notable Parts

White Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot] (5x) $0.75

Black Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole (4x) $0.60

Trans-Neon Green Large Figure Weapon Sword, Blade with Bar, Single Edge (3x) $1.50

Est. BrickLink Part Value

$2.85

💡 MOC Potential

🤖 Larger, more detailed mech with improved articulation

🚀 Futuristic spaceship or fighter jet

🚗 Off-road vehicle or dune buggy

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

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📖 Building Instructions 4

BI 3106, 60+4/65+115G, 71707 1/2 V29

Download PDF

BI 3106, 60+4/65+115G, 71707 1/2 V39

Download PDF

BI 3101, 52/65G, 71707 2/2 V29

Download PDF

BI 3101, 52/65G, 71707 2/2 V39

Download PDF

Inventory Statistics

Unique Parts

205

Total Pieces

Minifigures

Inventory Version: 1

Soar into Prime Empire!
With Kai's Mech Jet!

Kai's Mech Jet

📝 Our Take

Ask BlockTalk about this set

🧱 Building Experience

📈 Investment Analysis

📖 About This Set

⚖ Compare Similar Sets

2 Minifigures Included

📦 Full Parts Inventory - 90 unique parts • 205 total pieces

🛒 Where to Buy

💎 Notable Parts

💡 MOC Potential

📰 Ninjago News

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Kai's Mech Jet News (15)

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Community Insights

What Reddit Says

What YouTubers Say

📖 Building Instructions 4

Inventory Statistics

Soar into Prime Empire!With Kai's Mech Jet!

Kai's Mech Jet

📝 Our Take

Ask BlockTalk about this set

🧱 Building Experience

📈 Investment Analysis

📖 About This Set

⚖ Compare Similar Sets

2 Minifigures Included

📦 Full Parts Inventory - 90 unique parts • 205 total pieces

🛒 Where to Buy

💎 Notable Parts

💡 MOC Potential

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📰 Ninjago News

Random set of the day: Spinjitzu Dojo

70736 Without The Minifigs But With The Box And Instruction For 75€...

Double Trouble: Alternate LEGO Builds

Kai's Mech Jet News (15)

Random set of the day: Spinjitzu Dojo

70736 Without The Minifigs But With The Box And Instruction For 75€ W Or L?

Double Trouble: Alternate LEGO Builds

Random figure of the day: njo0245

Lego Technic 42205 Cyberpunk 2077 Mizutani Shion "Coyote"

Which nunchucks?

Ughhh, I wish I had an official USC Lego Ninjago Misfortune's Keep Lego Set f...

I knew that they were brittle but not this brittle

Community Insights

What Reddit Says

What YouTubers Say

📖 Building Instructions 4

Inventory Statistics

We value your privacy

Soar into Prime Empire!
With Kai's Mech Jet!