---
product_id: 286342886
title: "LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces)"
brand: "lego"
price: "€ 17.67"
currency: EUR
in_stock: false
url: https://www.desertcart.nl/products/286342886-lego-technic-heavy-duty-excavator-42121-toy-building-kit-cool
store_origin: NL
region: Netherlands
---

# 569 pieces 2-in-1 design 8+ age range LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces)

**Brand:** lego
**Price:** € 17.67
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Build, Play, Repeat! The ultimate construction adventure awaits!

## Quick Answers

- **What is this?** LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces) by lego
- **How much does it cost?** € 17.67 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/286342886-lego-technic-heavy-duty-excavator-42121-toy-building-kit-cool)

## 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

- • **Perfect Gift:** Ideal for birthdays or 'just because' moments for young builders!
- • **Build & Explore:** Unleash creativity with 569 pieces for endless construction fun!
- • **Realistic Mechanics:** Experience authentic moving parts that mimic real excavators.
- • **Transformative Play:** Easily rebuild into a tracked tractor for double the adventure!
- • **Imaginative Role-Play:** Dive into the world of construction with an authentic cabin and control panel.

## Overview

The LEGOTechnic Heavy-Duty Excavator 42121 is a 569-piece toy building kit designed for kids aged 8 and up. This versatile set features a 2-in-1 design that allows children to build both an excavator and a tracked tractor, complete with realistic moving parts and an authentic control panel, making it a perfect gift for young construction enthusiasts.

## Description

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. 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. 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.

## Features

- Whether it’s a birthday, holiday, 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

## Images

![LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces) - Image 1](https://m.media-amazon.com/images/I/61D7psO0l6L.jpg)
![LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces) - Image 2](https://m.media-amazon.com/images/I/81uEjX1jY-L.jpg)
![LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces) - Image 3](https://m.media-amazon.com/images/I/719alOeDIZL.jpg)
![LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces) - Image 4](https://m.media-amazon.com/images/I/81sYDj9gEuL.jpg)
![LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces) - Image 5](https://m.media-amazon.com/images/I/81+x3S+w5uL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Does this set also make the tractor too?**
A: Hello there! Yes, this 2-in-1 LEGO® Technic™ Heavy-Duty Excavator (42121) toy rebuilds into a tracked tractor. - Jayare, LEGO® Customer Service

**Q: Where to buy 42121 is it out of stock cant find it anywhere?**
A: You can find it at Walmart and target

**Q: Is the scale of this excavator kit 42121 close to the scale of the mobile crane kit 42108?**
A: Hi there! Set 42121 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. Set 42108 has a 30” (78cm) crane arm, and when fully built measures 18” (48cm) long and 4” (11cm) wide. We hope this helps! - Heather, LEGO® Customer Service

**Q: Is this set remote-controlled?**
A: No, this set doesn't have a remote-controller, but you can rebuild this model into a tracked tractor with backhoe. - Alina, LEGO® Customer Service

## Frequently Bought Together

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-25*