Beginner
≈ 9 h 45 minSuggested range5 h 45 min – 15 h 45 min
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Ninjago · SET 71870
The Twin Titan Mechs
Two titan mechs share the scene with differently coloured armour and weapons.
- Pieces
- 1,707
- Release year
- 2026
- Theme
- Ninjago
- Set number
- 71870
- LEGO recommended age
- 12+
- LEGO Italy price
- 139.99 €
Source: LEGO Italy · Price checked on 26 October 2026. Price and availability may change. Check the store for current details. This is not a verified launch price.
Official English name verified at: LEGO English catalogue ↗ · Checked on 26 October 2026.
TIME TO BUILD
How long does it take to build The Twin Titan Mechs?
A starting point for planning your build. Times for each experience level are editorial estimates, not measurements submitted by HowLongToBuild users.
Editorial estimate · first build
Intermediate
≈ 6 h 30 minSuggested range3 h 45 min – 10 h 30 minExperienced
≈ 4 h 30 minSuggested range2 h 30 min – 7 h 30 minBased on one person building the set for the first time, following the original instructions and using numbered bags where supplied. Includes normal piece-finding and minor adjustments; excludes long breaks, filming, dismantling and modifications. Sources may use different methods. This range is neither a statistical interval nor a limit: your build may take less or more time.
How we estimate times · sources and method
Editorial assessment of the first illustrated arrangement: Two titan mechs share the scene with differently coloured armour and weapons. Large weapons and shoulder panels extend the outlines beyond the leg frames. A first build following the instructions, including normal piece finding; an adult may help when needed. Breaks and subsequent play are excluded. No verified timed build: indicative values with substantial variation.
Sources do not always specify the builder’s experience. The three experience bands are our editorial assessment, based on the complexity of the set and individual accounts where available.
- LEGO · set-specific instructions ↗
Official name, pieces, age and imagery; no timed building data.
- LEGO · set manual ↗
Document for this set number. The duration is an editorial estimate, not a LEGO timing.
Checked: 26 October 2026 · Method v1.0 · Limited reports; not a statistical average.
BUILT BY THE COMMUNITY
Yours could be the first building time.
0 reviewed solo building times.
No solo building times have been reviewed yet. You can still find editorial estimates under Suggested times.
Log your buildBuild your own story.
Save this set to your collection, track your progress and share your building time.
Create a free account →BEYOND THE BRICKS
Did you know?
Inside the set
Two distinct giants
Red and blue separate the figures, clearly marking the two main builds.
LEGO sourceWeapons and armour
Large weapons and shoulder panels extend the outlines beyond the leg frames.
LEGO sourceBeyond the set
The stories, places and inventions behind your build.
Prototypes before mechs
Honda moved from externally powered prototypes to autonomous bipeds. Balance and coordination are real challenges distinct from toy poses.
HondaStairs and trolleys
The untethered 1996 P2 could walk, climb stairs and push trolleys, everyday tasks requiring years of research.
HondaWritten by HowLongToBuild · Sources are linked with each story · Checked on 26 October 2026. Historical facts and story details refer to the context described.
THE COMMUNITY’S EXPERIENCE
What was it like to build?
Three separate scores from 1 to 10. For difficulty, 1 means very easy and 10 means very difficult.
No approved ratings yet. Scores are never generated by this site or inferred from the recommended age.
Sign in or create an account to rate this set →Building tips from the community
Specific steps, useful checks and sticking points. Contributions appear after moderation, in their original language. Do not upload instruction pages or personal contact details.
No approved tips yet.
Sign in to contributeSET THE MOOD
A soundtrack for your build
The Twin Titan Mechs · Selected for the subject and atmosphere
For intricate structures and extended sessions we choose a quieter ambient texture. It leaves space for the instructions, while the electronic alternative adds energy when you want it.
OUR PICK
Ambient 1: Music for Airports
Brian Eno
Ambient · minimal and relaxedTry a different atmosphere
ANOTHER MOOD
TRON: Legacy
Daft Punk
Electronic and orchestral · pulsingA build to spread over several sessions: choose the more understated option when you want the instructions to take centre stage. The music does not set your pace.
Editorial suggestions, not official soundtracks for the set. External services may require an account or subscription; editions and availability can vary by country. Suggest another soundtrack →
Report a problem with this set →
YOUR NEXT BUILD
You might also like
Sets from the same theme or with similar suggested building times. The ranges shown are for intermediate builders.
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Final Flight of Destiny's Bounty
1,253 pieces · 9+
3 h 45 min – 10 h 30 min
Suggested time · Intermediate
Same theme, a new build
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
The Guardian Dragon
1,650 pieces · 14+
4 h – 9 h 30 min
Suggested time · Intermediate
Same theme, a new build
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Samurai X Cave Chaos
1,253 pieces · 9+
3 h 45 min – 10 h
Suggested time · Intermediate
Same theme, a new build