---
product_id: 161121162
title: "40 Model Building Set‚ 141 Pieces, STEM Toy, Engineering Play, Creative Construction‚ Ages 5+"
brand: "k'nex"
price: "€ 88.78"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/161121162-40-model-building-set-141-pieces-stem-toy-engineering-play
store_origin: HR
region: Croatia
---

# 40 unique buildable models 141 versatile snap-fit pieces Real moving parts for interactive play 40 Model Building Set‚ 141 Pieces, STEM Toy, Engineering Play, Creative Construction‚ Ages 5+

**Brand:** k'nex
**Price:** € 88.78
**Availability:** ✅ In Stock

## Summary

> ⚙️ Build, move, and innovate—because imagination deserves motion!

## Quick Answers

- **What is this?** 40 Model Building Set‚ 141 Pieces, STEM Toy, Engineering Play, Creative Construction‚ Ages 5+ by k'nex
- **How much does it cost?** € 88.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/161121162-40-model-building-set-141-pieces-stem-toy-engineering-play)

## Best For

- k'nex enthusiasts

## Why This Product

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

## Key Features

- • **STEAM-Powered Play:** Boosts fine motor skills, spatial reasoning, and engineering fundamentals
- • **Portable & Organized:** Sturdy suitcase-style box with handle keeps your creations and parts tidy
- • **Dynamic, Moving Models:** Create interactive toys with real moving parts for hands-on learning
- • **Master Builder’s Guide:** Step-by-step instructions for 40 innovative models from cars to skyscrapers
- • **Endless Creativity Unleashed:** 141 classic and micro pieces snap securely for limitless designs

## Overview

The K'NEX 40 Model Building Set features 141 snap-fit pieces enabling kids 5+ to construct 40 different models with real moving parts. Designed to enhance STEM skills, it includes a handy instruction booklet and a portable storage box, making creative engineering accessible and fun.

## Description

K'NEX - 40 Model Building Set‚ 141 Pieces, STEM Toy, Engineering Play, Creative Construction‚ Ages 5+

## Features

- 141 PIECES – This set comes with 141 classic and micro K'NEX parts and pieces that "click" together, allowing kids to create anything that they can imagine. It includes rods and connectors that are attached to one another in different ways, allowing kids to unleash their creativity and skills in designing a variety of shapes, figures, and models. The snap-fit pieces stick together securely and can be easily reassembled into other creations.
- BUILD & REBUILD – Includes an instruction booklet that shows builders how to create 40 unique models with its step-by-step guidelines like a car, a skyscraper, an airplane, a rowboat, and so much more! This toy is ideal for kids ages 7 and above, allowing them to create anything that their minds can come up with. Watch your kids’ imaginations grow through the sheer amount of models they can make with the K’NEX 40 Model Building Set.
- STEAM LEARNING FUN – Building with K'NEX helps strengthen fine motor skills, manual dexterity, and spatial relations. Both exciting and educational, K'NEX can help children learn basic principles of physics, engineering and architecture.
- REAL MOVING PARTS – Unlike other building toys, K’NEX lets builders create different models that actually move. This building set allows them to make interactive toys and figures like cars, airplanes, and animals. Constructing your own parasail, windmill, or robot isn’t just a dream when you have this building set!
- CONVENIENT STORAGE – storing small plastic toy parts is easy with the sturdy suitcase-style box with a handle for easy clean-up and portable storage. Keep everything together, including loose parts and partially built models.

## Images

![40 Model Building Set‚ 141 Pieces, STEM Toy, Engineering Play, Creative Construction‚ Ages 5+ - Image 1](https://m.media-amazon.com/images/I/81XnEovqNyL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can these pieces attach to other sets?**
A: Kid K'NEX parts will work with parts from other Kid K'NEX sets.  They will not work with the smaller parts in regular "K'NEX" sets so be sure to look for sets that say "Kid K'NEX".

**Q: Can these be use with regular size knex?**
A: The Kid K'NEX Oodles of Pals Building Set parts are larger, softer plastic parts for small hands to easily manipulate and they snap together like regular K'NEX but they are not compatible.

**Q: What’s hat are the pieces and how many of each come with this set? are the pieces that come in this set?**
A: Hi there, thank you for your inquiry - there are 116 pieces included with this kit.  To best see the custom parts including 2 different types of eyes and a cute animal face, please visit our Basic Fun website (unfortunately we are not permitted to post the URL here), go to "Support" - "instructions" - "Knex" and type in the style # of this kit which is 85701 - you will see the full instructions including the pieces and part count.  Please let us know if you need anything else & happy building!  - Your Friends at Basic Fun

**Q: How many eyes come in this set?**
A: It comes with one pair that are stuck together that are blue and two individual purple eyes.  Hope that helps.

## Frequently Bought Together

- K'NEX - 40 Model Building Set‚ 141 Pieces, STEM Toy, Engineering Play, Creative Construction‚ Ages 5+
- K'NEX - Adventure Wheels Building Set - 480 Pieces‚ STEM Building, Creative Construction Set‚ Ages 7+
- K'NEX - Click & Construct Value Building Set - 522 Pieces, STEM Building, Creative Play Set‚ Ages 7+

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**Shop now:** [https://www.desertcart.hr/products/161121162-40-model-building-set-141-pieces-stem-toy-engineering-play](https://www.desertcart.hr/products/161121162-40-model-building-set-141-pieces-stem-toy-engineering-play)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-09*