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Item 1 of 17
LEGO®42121
New
Technic™Technic™

Heavy-Duty Excavator

Average rating4.6out of 5 stars

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Price€44,99

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Looking for a special gift for kids who love construction toy sets? This 2-in-1 LEGO® Technic™ Heavy-Duty Excavator (42121) toy has plenty of features for hours of creative play. Boys and girls aged 8 and up will enjoy an immersive building challenge before exploring the digger toy's realistic features.

See how an excavator works
Digging, driving, rotating; there's so much to discover in this cool kids' excavator toy. Check out the shovel that moves up and down, plus the movable arm, running belts and rotating body. There’s also a detailed cabin with a driver’s seat and control panel. The set comes with extra LEGO brick ‘stones’ to dig and 4 cones. When it’s time for a new challenge, the model rebuilds into a tracked tractor with backhoe.

A rewarding build for young LEGO fans
The LEGO Technic universe offers advanced building toys for LEGO fans ready for their next challenge. With realistic mechanisms, these rewarding sets are a great way to introduce kids to the world of engineering.

  • Whether it’s a birthday, Christmas, or ‘just because’ gift, young construction fans will love building and exploring this 2-in-1 LEGO® Technic™ Heavy-Duty Excavator (42121) toy set.
  • Packed with realistic features, this digger toy set lets kids see how construction vehicles really work. Check out the moving shovel and arm, plus running belts, just like on a real excavator.
  • When kids are ready for a new challenge, the 2-in-1 toy model rebuilds into a tracked tractor with backhoe.
  • This cool excavator toy for kids is ideal for boys and girls aged 8 and up who love construction vehicles.
  • With the authentic cabin and control panel to explore, it’s easy for kids to imagine life on a construction site with this cool excavator toy.
  • Role-play is easy with this cool set. There are 4 cones to manage the building site, plus extra LEGO® pieces to use as bricks for scooping up with the digger truck toy.
  • This kids' excavator toy model measures over 9 in. (23 cm) high, with arm up,14.5 in. (37 cm) long, with arm fully extended, and 4 in. (11 cm) wide.
  • The LEGO® Technic™ universe opens up the world of engineering for young LEGO fans ready for their next building challenge.
  • LEGO® components meet stringent industry standards to ensure they are consistent, compatible and connect reliably every time – it's been that way since 1958.
  • LEGO® components are dropped, heated, crushed, twisted and analyzed to make sure they meet strict global safety standards.
Building Instructions
Heavy-Duty Excavator
  • Free standard 2 to 3 business day delivery on all merchandise orders over 55 €!
  • Express delivery available at checkout.
  • Custom parts orders are sent separately from merchandise and take additional time to process and deliver.
  • Unopened merchandise may be returned for a full refund within 90 days of receipt of your order.
Some exclusions apply. Visit our Deliveries and Returns page for more information.

Overall RatingAverage rating4.6out of 5 stars
(9 Reviews)
100% would recommend this product.

Rating

Overall Experience

Play ExperienceAverage rating4.1out of 5 stars
Level of DifficultyAverage rating2.9out of 5 stars
Value for MoneyAverage rating4.6out of 5 stars
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Reviews

  • March 14th, 2021
    Average rating5out of 5 stars
    Amazing Little Machine!!!
    | 45-54
    I would recommend this to a friend!
    Purchased for: Self
    I have dozens of Lego sets of all varieties and have been building and collecting them for nearly 50 years! This is however my first review. when I saw this set come up I knew at once I would purchase it and I was in no way disappointed in doing so. In my estimation it is a great set at a great price point and I highly recommend it. That being said there is in my opinion one flaw... Good news, it is easily corrected with existing pieces from the set! The flaw resides in the "curl" function of the bucket which impairs its ability to adequately pick up or maintain a load. I have attached pictures which hopefully will aid anyone wishing to make the change. Thanks for reading and enjoy!
    Play ExperienceAverage rating4out of 5 stars
    Level of DifficultyAverage rating3out of 5 stars
    Value for MoneyAverage rating5out of 5 stars
    Build Time: 2 hrs
    Building Experience: Intermediate LEGO builder
    Was this helpful?
    55Heavy-Duty Excavator
  • March 6th, 2021
    Average rating5out of 5 stars
    Excellent Excavator
    | 19-24
    I would recommend this to a friend!
    Purchased for: Self
    This is a very nice build, and I was really impressed by how highly detailed this is for a smaller technic build. Unlike some other previous excavators which are a bit skeletal this has very few panel gaps. The only issue I had was that the bucket has a bit of a limited range so you can’t use it to it’s full capacity when picking stuff up. Other than that I can’t fault it. It looks right at home next to modular buildings too!
    Play ExperienceAverage rating4out of 5 stars
    Value for MoneyAverage rating5out of 5 stars
    Build Time: 2 hrs
    Building Experience: Intermediate LEGO builder
    Was this helpful?
    55Heavy-Duty Excavator
  • April 3rd, 2021
    Average rating3out of 5 stars
    More interesting than expected but unfortunate QC
    | 19-24
    I would recommend this to a friend!
    Purchased for: Self
    The set in general was great! I bought it because the mechanisms interested me and it had parts that I didn't have in my collection. The build took more attention to detail than I thought and the arm was more complex as well - both good things! It wasn't over quickly which makes it more enjoyable. However when adding a few pieces to the vehicle's body, there were several that didn't alight properly when placed beside eachother on one of the technic axles. The hole for the axle must be just a few degrees off. Noticeable only if you look closely. I wouldn't attribute this to the set itself, just some unfortunate mixing of parts.
    Level of DifficultyAverage rating3out of 5 stars
    Value for MoneyAverage rating3out of 5 stars
    Build Time: 1 hrs 30 mins
    Building Experience: Advanced LEGO builder
    Was this helpful?
    35Heavy-Duty Excavator
  • March 5th, 2021
    Average rating5out of 5 stars
    Enjoyable!
    | 19-24
    I would recommend this to a friend!
    Purchased for: Self
    When I saw pictures of this set, I thought it was neat but not something I wanted to buy. After some time, though, I decided to make the purchase and I was pleasantly surprised with how much I enjoyed this set. There are plenty of useful pieces, like four universal joints, two small linear actuators, some panel pieces and treads. The lack of a gearbox was disappointing at first, but the end result proved to be rather fun even without it. If you are new to technic, I think you will especially enjoy this set.
    Play ExperienceAverage rating5out of 5 stars
    Level of DifficultyAverage rating3out of 5 stars
    Value for MoneyAverage rating5out of 5 stars
    Build Time: 1 hrs 30 mins
    Building Experience: Advanced LEGO builder
    Was this helpful?
    55Heavy-Duty Excavator
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