Beginner
≈ 5 hSuggested range3 h 15 min – 7 h 15 min
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
City · SET 60421
Robot World Roller-Coaster Park
A futuristic park mixes coaster, arcade and e-sports, with a three-car train and articulated mech.
- Pieces
- 986
- Release year
- 2024
- Theme
- City
- Set number
- 60421
- LEGO recommended age
- 8+
- LEGO retail price · Italy
- 99.99 €
Retired from the LEGO Italy catalogue when checked on 23 October 2026. Availability can change. Check the store for the latest information.
Retail price reported by the LEGO source for the stated market. Check the store for current price and availability; this does not establish the launch price. LEGO ↗ · Reference checked on 23 October 2026
Official English name verified at: LEGO English catalogue ↗ · Checked on 24 October 2026.
TIME TO BUILD
How long does it take to build Robot World Roller-Coaster Park?
A starting point for planning your build. Times for each experience level are editorial estimates, not measurements submitted by HowLongToBuild users.
Editorial model estimate · no verified measured building time
Intermediate
≈ 3 h 15 minSuggested range2 h – 4 h 45 minExperienced
≈ 2 h 15 minSuggested range1 h 15 min – 3 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
Aligned track, supports, arcade and mech. Initial rolling check included. The three central durations are model-specific editorial assessments. Planning ranges extend approximately from 65% to 145%, rounded to quarter-hours; they are not measured experience-level averages or guaranteed limits.
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 Italy · Robot World Roller-Coaster Park ↗
This source documents the model’s features and components, not a timed build. No sufficiently verifiable individual building-time report has been identified for this set.
- LEGO building instructions · Robot World Roller-Coaster Park ↗
Set-specific instructions checked against the set number, piece count and year. The duration is an editorial assessment based on piece count, construction type, mechanisms and detail.
Checked: 23 ottobre 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.
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Create a free account →BEYOND THE BRICKS
Did you know?
Inside the set
Through the arcade
The track runs through a video-game venue, combining mechanical attraction and games rooms.
LEGO sourceA mech beyond the screen
An articulated figure joins the coaster and eight minifigures.
LEGO sourceBeyond the set
The stories, places and inventions behind your build.
Before arcades, coin machines
Mechanical entertainment predates video games. Berliner’s gramophone brought sound reproduction to discs.
Library of CongressMusic for toys too
Early Berliner discs included hand-cranked toy examples, linking technology and entertainment.
Library of CongressWritten by HowLongToBuild · Sources are linked with each story · Checked on 23 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.
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Sign in to contributeSET THE MOOD
A soundtrack for your build
· Selected for the subject and atmosphere
Piano, noise and silence draw attention to sonic texture. The pairing follows unusual surfaces and suspended moods, offering something less predictable than conventional relaxing piano.
OUR PICK
async
Ryuichi Sakamoto
Intimate and spaciousEditorial 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 →
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YOUR NEXT BUILD
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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 ↗
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
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