LEGO Technic Planet Earth and Moon in Orbit Building Set, Outer Space Birthday Gift for 10 Year Olds, Solar System Toy for…
Best for
Best non-vehicle Technic build
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 2 trusted sources
Current price
$63.99
Updated May 18, 2026 · 1 min read
Sources behind this verdict
10 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the LEGO Technic Planet Earth and Moon in Orbit (42179) is the most distinctive Technic set in the current range — and one of the best-reviewed. brickarchitect.com calls it 'an interesting building experience and an exceptional learning opportunity,' and josephshoer.com, writing from a spacecraft-engineering background, gives the model qualified praise for its minimalist styling and educational framing. Amazon's 4.9-star average across 1,721 reviews is the highest in this roundup.
What reviewers liked
- Highest Amazon rating in the pool (4.9 / 1,721 reviews)
- brickarchitect.com and josephshoer.com (a spacecraft engineer) both publish substantive, positive long-form reviews
- Genuinely educational orrery mechanism that demonstrates Earth–Moon orbital motion
- r/lego and r/legotechnic threads describe a satisfying ~90-minute build, friendly to non-vehicle builders
Where it falls short
- r/lego threads document gear binding that causes the orrery to lock up after a couple of rotations
- r/legotechnic discussions note the gearing is approximate rather than astronomically accurate
- Smaller and less visually imposing on a shelf than Technic vehicles at a similar price
- Replay value is limited once the mechanism is understood, compared to vehicle Technic builds
Across the reviewers we read, the LEGO Technic Planet Earth and Moon in Orbit (42179) is the most distinctive Technic set in the current range — and one of the best-reviewed. brickarchitect.com calls it 'an interesting building experience and an exceptional learning opportunity,' and josephshoer.com, writing from a spacecraft-engineering background, gives the model qualified praise for its minimalist styling and educational framing. Amazon's 4.9-star average across 1,721 reviews is the highest in this roundup.
The r/legotechnic and r/lego threads we read are mostly positive — builders describe a satisfying 90-minute build with cool mechanisms — but also document real issues. One r/lego thread reports the orrery 'locks up' after a couple of Earth rotations, with the crank refusing to move. Multiple threads ask, fairly, whether the gearing actually represents 365 Earth rotations per orbit, and the answer in those discussions is essentially 'close, but not astronomically accurate.'
For anyone wanting a Technic set that isn't a car, truck or aircraft, the consensus across high-trust sources is that this is the standout option. Just go in understanding the mechanism needs careful assembly to avoid binding.
- Interactive model – Inspire kids to build a representation of the Earth, Sun and Moon in orbit with this LEGO Technic Planet Earth and Moon in Orbit building toy for kids aged 10 and up
- Educational space toy – Kids can turn the crank to see how the Earth and the Moon orbit around the Sun
- Includes months and moon phases – This solar system toy includes printed details, like the month and moon phases to help kids see how the Earth’s orbit affects our seasons. Perfect space room décor for boys and girls
- A space gift for kids – This set makes a fun birthday gift for 10 year olds who love planet toys and learning more about our solar system
- Intuitive instructions – The LEGO Builder app guides your youngster on an intuitive building adventure with tools that let them zoom in and rotate models in 3D, save sets and track their progress
- Measurements – 526-piece set with a model measuring over 9 in. (24 cm) high, 12.5 in. (33 cm) long and 7 in. (18 cm) wide
Bought and built this today on a whim. Great 90-minute build for a lazy afternoon. The mechanisms are cool and it's great to see it in action.
I'll get straight to the point: how accurate this thing is? I mean, i don't expect to have an astronomical (no pun intended) precision, but: more of a ...
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“I tried LEGO Technic again” · LEGO Orrery Review
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