Breaking News

LEGO Retiring Soon List – October 2026 Update

The Brick Fan • about 6 hours ago

LEGO 2x Insiders Points Shopping Event Live – October 2026

The Brick Fan • 1 day ago

🏛 Ninjago

Set #891729

Kai

Kai is a great impulse buy for Ninjago fans.

Before you buy

Who it's for: Ages 5+ · Beginner build Young Ninjago fans
Build: 10 pieces · about 0.3 hours Build time is an estimate.
Availability: Likely retired

★★★☆☆ 3.8 community rating from 43 ratings

Fans appreciate the affordable way to get a Kai minifigure, but some find the overall set lacking in building experience. A decent impulse buy for Ninjago completionists.

Check price on eBay

📝 Our Take

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

Kai is a great impulse buy for Ninjago fans. This blister pack offers an affordable way to get a Kai minifigure with unique accessories.

This set is perfect for kids who love Ninjago and want to add Kai to their collection. It's a quick and easy build, suitable for even the youngest LEGO enthusiasts.

Skip this if you're looking for a challenging build or a large display piece. Consider larger Ninjago sets for more complex building experiences.

✨ New

Ask BlockTalk about this set

AI assistant with full set data

BlockTalk

Hi! I'm BlockTalk, your LEGO expert. Ask me anything about the Kai - building tips, investment potential, comparisons, or anything else!

Try asking:

Is this Kai minifigure exclusive to this set? How does this set compare to other Ninjago character packs? What other accessories can be added to this Kai minifigure? Is this a good set for starting a Ninjago collection?

🧱 Building Experience

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

🧩

Pieces

⏱

0.25h

Estimated Build Time

📊

Beginner

Difficulty

Build Highlights:

Simple and quick build
Focus on the minifigure and accessories
Easy to add to a Ninjago collection
Great for imaginative play

📈 Investment Analysis

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

↑ Trending up since release

C+

Investment Grade

⏳ Retired

The Kai blister pack, while small, benefits from being a licensed Ninjago product. Given its low piece count and single minifigure, appreciation will likely be slow but steady, driven by Ninjago's enduring popularity. Its retirement and the increasing price trend suggest a potential for modest growth, especially if the Kai minifigure is unique or highly desirable.

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

⚖ Compare Similar Sets

Onyx Ninja Mech Battle Pack

Compared to larger Ninjago sets, this blister pack offers a more affordable entry point into the theme. While it lacks the building complexity of sets like 71705-1 (Destiny's Bounty), it provides a quick way to acquire a Kai minifigure. Consider this if you prioritize minifigure collecting over complex builds.

1 Minifigure Included

Kai with Shoulder Armour (Hands of Time)

5 parts

The Kai minifigure with Shoulder Armour (Hands of Time) is the main draw of this set. The unique shoulder armor and flame accessories add to its collectible value.

📦 Parts Inventory

Official piece count: 10
Parts cataloged in this inventory: 3 unique parts, 5 pieces
Minifigures: 1

The official piece count includes the 5 parts inside the set's minifigures, which this inventory lists separately. 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.

Weapon Sword / Ka...

Part #: 21459 1× Flat Silver

Wave / Flame Roun...

Part #: 6126b 2× Trans-Orange

Plate Round 1 x 1...

Part #: 85861 2× Trans-Orange

The trans-orange flame pieces are useful for adding elemental effects to MOCs. The flat silver katana is a standard Ninjago weapon.

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 3 videos

Searching for YouTube reviews...

This may take a moment

Community Sentiment

Based on 3 YouTube reviews

Not enough Reddit data

YouTube

3.0 /5

Mixed

0% positive

Positive

Mixed

Critical

BlockTalk AI Analysis

YouTube reviews of LEGO Kai sets are generally neutral, showcasing set features and minifigures. Bricks By Mind offers early looks at sets like Kai's Ninja Climber Mech and Dragon Mech Battle Pack, while JANG's LEGO Reviews provides detailed, independent reviews of sets like Kai's Elemental Fire Mech.

Inventory Statistics

Unique Parts

Official Piece Count

Cataloged Inventory Pieces

Minifigures

The official piece count includes the 5 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Inventory Version: 1

Missing a piece? Use the Missing Piece Checker.

Unleash Your Inner Ninja!
With Kai of Ninjago

LEGO Retiring Soon List – October 2026 Update

LEGO 2x Insiders Points Shopping Event Live – October 2026

Kai