---
product_id: 286221204
title: "LEGO 42121 Technic Heavy-Duty Excavator"
brand: "lego"
price: "Bs.3400"
currency: BOB
in_stock: false
reviews_count: 13
url: https://www.desertcart.bo/products/286221204-lego-42121-technic-heavy-duty-excavator
store_origin: BO
region: Bolivia
---

# 1.5-hour build time realistic moving shovel & arm 569 precision pieces LEGO 42121 Technic Heavy-Duty Excavator

**Brand:** lego
**Price:** Bs.3400
**Availability:** ❌ Out of Stock

## Summary

> 🚧 Dig into creativity with the ultimate heavy-duty build!

## Quick Answers

- **What is this?** LEGO 42121 Technic Heavy-Duty Excavator by lego
- **How much does it cost?** Bs.3400 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/286221204-lego-42121-technic-heavy-duty-excavator)

## Best For

- lego enthusiasts

## Why This Product

- Trusted lego brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durability Meets Design:** Crafted to LEGO’s legendary safety and quality standards, this model withstands the rigors of play and display alike.
- • **Site Management Included:** Includes 4 cones and extra bricks to simulate real excavation site logistics, adding layers of immersive play and learning.
- • **Build & Bond Across Generations:** Perfect for ages 8+, this set fosters creative thinking and dexterity, making it a bonding activity for professionals and their kids.
- • **Authentic Construction Experience:** Operate a fully functional shovel and arm with running belts that mimic real heavy-duty excavators, bringing engineering to life.
- • **Precision Engineering in Every Brick:** Experience the satisfying snap of 569 meticulously designed LEGO pieces that guarantee a flawless build every time.

## Overview

The LEGO 42121 Technic Heavy-Duty Excavator is a 569-piece construction set designed for ages 8 and up, featuring realistic moving parts like a shovel, arm, and running belts. It offers an engaging 1.5-hour build that enhances creative thinking and dexterity, all while meeting LEGO’s strict safety and quality standards. Perfect for professionals seeking a sophisticated, hands-on model that blends fun with engineering precision.

## Description

Product Description LEGO components meet stringent industry standards to ensure they are consistent, compatible and form a secure connection every time – it’s been that way since 1958. LEGO components are dropped, heated, crushed, twisted and analysed to make sure they meet stringent global safety standards. Safety Warning Warning! Choking hazard. Small parts. Not suitable for children under 3 years old.

Review: A very study and entertaining model! - I'e always loved Lego Technic and have recently started to buy models as future investments. Not this one though, this one needed to be built and I'm glad i did! It took me about 1 1/2 hours to build, but I found the whole process simple and easy to follow. Its surprisingly study as well and has survived many fights with my twins girls who are both fascinated with lego now....no that i can let them build anything yet (they are 2 years old!) For the money, its well worth it!
Review: Looks good - It's Lego, so it goes without saying that it's a quality product. Good fitting pieces ( none mssing) and excellent instructions. I don't know if it's me, but for £60 it didn't take that long to complete. Good looking, working model non the less.

## Features

- Heavy-Duty Excavator
- The toy set lets kids see how construction vehicles really work with moving shovel and arm, plus running belts, just like on a real excavator
- There are 4 cones to manage the building site, plus extra LEGO pieces to use as bricks for scooping up during all possible excavation works
- Manufacturer recommended age: 8+
- Number of pieces: 569

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08G4CKL16 |
| Assembly Required | Yes |
| Batteries | 2 AA batteries required. |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 132,357 in Toys & Games ( See Top 100 in Toys & Games ) 3,920 in Toy Building Sets |
| Colour | Multicolor |
| Customer Reviews | 4.7 4.7 out of 5 stars (5,679) |
| Date First Available | 1 Mar. 2021 |
| Educational Objective(s) | Creative Thinking, Dexterity |
| Item model number | 42121 |
| Language | English |
| Manufacturer recommended age | 8 years and up |
| Material Type(s) | Plastic |
| Number of pieces | 569 |
| Product Dimensions | 28.2 x 26.2 x 7.6 cm; 640 g |
| Release date | 1 Mar. 2021 |
| Remote Control Included? | No |
| Scale | LEGO® TECHNIC |

## Product Details

- **Brand:** LEGO
- **Colour:** Multicolor
- **Educational objective:** Creative Thinking, Dexterity
- **Manufacturer Minimum Age (MONTHS):** 96
- **Material:** Plastic
- **Model name:** LEGO Technic Heavy-Duty Excavator Building Set 42121
- **Number of pieces:** 569
- **Special feature:** Moving Shovel And Arm, Running Belts
- **Sub brand:** Technic
- **Theme:** Vehicle

## Images

![LEGO 42121 Technic Heavy-Duty Excavator - Image 1](https://m.media-amazon.com/images/I/818hhLz1fzL.jpg)
![LEGO 42121 Technic Heavy-Duty Excavator - Image 2](https://m.media-amazon.com/images/I/81DN81Dv08L.jpg)
![LEGO 42121 Technic Heavy-Duty Excavator - Image 3](https://m.media-amazon.com/images/I/81K6Vbg9G1L.jpg)
![LEGO 42121 Technic Heavy-Duty Excavator - Image 4](https://m.media-amazon.com/images/I/81OY3SOjecL.jpg)
![LEGO 42121 Technic Heavy-Duty Excavator - Image 5](https://m.media-amazon.com/images/I/81jGt4wkulL.jpg)

## Questions & Answers

**Q: Power will it work got power from volvo 6x6 kit wondered if it could be controllable**
A: I don't think so.

**Q: Does this set have pneumatic parts?**
A: No, this set has no pneumatic parts or functions. Movement occurs by turning what is referred to as the hand of God black wheel.
This black gear/wheel when manually turned causes the bucket to move, also lifts/lowers the arm holding the bucket.
I hope I have satisfactorily answered your question.

**Q: Would this be suitable for my son's 40th birthday? He is a Groundworks estimator.**
A: Sorry not sure. I bought it for my grandson who is 8 and he did it in one day.  He has loads though so he loves doing them.  My daughter said he loved it.  I'm sure if he likes Lego stuff he will enjoy doing it. Your never too old.

**Q: As a prime customer when will I receive this item if I decide to order**
A: When looking/examining the item on Amazon, this is done by entering the Lego set number, Amazon will advise when delivery will be made.
I hope this answers your question.

## Customer Reviews

### ⭐⭐⭐⭐⭐ A very study and entertaining model!
*by M***N on 22 September 2022*

I'e always loved Lego Technic and have recently started to buy models as future investments. Not this one though, this one needed to be built and I'm glad i did! It took me about 1 1/2 hours to build, but I found the whole process simple and easy to follow. Its surprisingly study as well and has survived many fights with my twins girls who are both fascinated with lego now....no that i can let them build anything yet (they are 2 years old!) For the money, its well worth it!

### ⭐⭐⭐⭐⭐ Looks good
*by G***. on 25 February 2023*

It's Lego, so it goes without saying that it's a quality product. Good fitting pieces ( none mssing) and excellent instructions. I don't know if it's me, but for £60 it didn't take that long to complete. Good looking, working model non the less.

### ⭐⭐⭐⭐⭐ Good investment, money well spent. Lovely set.
*by P***E on 21 July 2021*

A lovely, satisfying set to build. Bags are numbered from 1-4. Instructions are easy to follow. Each numbered bag covers a section in the instructions. Building the 86 link drive chain(43 links per side.) requires concentration and discipline. In conclusion: A worthy investment, value for money. All bricks/pieces fit well together. End result satisfying.

## Frequently Bought Together

- LEGO® Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday;Construction Toys
- LEGO Technic Heavy-Duty Bulldozer Building Set, Kids’ Construction Toy, Vehicle Gift for Boys and Girls Ages 7 and Up, 42163
- LEGO Technic Backhoe Loader Construction Toy - Building Toy Set for Boys and Girls, Ages 7+ - Educational Gift Idea for Kids Birthday with Usable Back Digger, Scoop, & Outriggers - 42197

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*Product available on Desertcart Bolivia*
*Store origin: BO*
*Last updated: 2026-03-04*