Beginner
≈ 3 h 45 minSuggested range2 h – 6 h
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Ninjago · SET 71736
Boulder Blaster
A ninja aircraft with a large front assembly and small prison. The long shape and cylindrical details use different sequences from ordinary flat wings.
- Pieces
- 449
- Release year
- 2021
- Theme
- Ninjago
- Set number
- 71736
- LEGO recommended age
- 8+
- Historical price in EUR
- Not verified
The historical euro price has not been verified. No current offer or conversion from another market is shown.
Official English name verified at: LEGO English archive ↗ · Checked on 26 October 2026.
TIME TO BUILD
How long does it take to build Boulder Blaster?
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
≈ 2 h 30 minSuggested range1 h 15 min – 4 hExperienced
≈ 1 h 45 minSuggested range1 h – 2 h 45 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: A ninja aircraft with a large front assembly and small prison. The long shape and cylindrical details use different sequences from ordinary flat wings. The small prison is built separately from the aircraft. A first build following the instructions, including normal piece finding; an adult may help when needed. Breaks, subsequent play and any alternative models are excluded. For older sets, unnumbered bags or previously mixed pieces may prolong sorting. 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.
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Create a free account →BEYOND THE BRICKS
Did you know?
Inside the set
A circular nose
Large gold-coloured elements frame the dark craft's front section.
LEGO sourceA ground structure
The small prison is built separately from the aircraft.
LEGO sourceBeyond the set
The stories, places and inventions behind your build.
Four forces in every flight
Lift, weight, thrust and drag act together on an aircraft. In straight, level flight at constant speed they balance: the engines mainly counter drag, while the wings produce most of the lift.
NASAWeight changes along the way
Burning fuel changes an aircraft’s weight and mass distribution. Pilots adjust the controls to keep it balanced: even an apparently uneventful journey involves small adjustments.
NASAWritten 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.
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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
Boulder Blaster · Selected for the subject and atmosphere
Piano miniatures, contrasts and musical colours lend an imaginative character to figures and fantasy worlds. A suggestion for finding a sense of wonder as you build.
OUR PICK
Debussy – Rameau
Víkingur Ólafsson
Piano · colour and small contrastsTry a different atmosphere
ANOTHER MOOD
Green
Hiroshi Yoshimura
Ambient · light and contemplativeEditorial 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
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Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
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Suggested time · Intermediate
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Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
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