---
product_id: 161121162
title: "40 Model Building Set‚ 141 Pieces, STEM Toy, Engineering Play, Creative Construction‚ Ages 5+"
brand: "k'nex"
price: "£39.98"
currency: GBP
in_stock: true
reviews_count: 8
category: "K'nex"
url: https://www.desertcart.co.uk/products/161121162-40-model-building-set-141-pieces-stem-toy-engineering-play
store_origin: GB
region: United Kingdom
---

# Real moving parts for dynamic builds 40 step-by-step model guides 141 versatile snap-fit pieces 40 Model Building Set‚ 141 Pieces, STEM Toy, Engineering Play, Creative Construction‚ Ages 5+

**Brand:** k'nex
**Price:** £39.98
**Availability:** ✅ In Stock

## Summary

> 🚀 Build, move, and innovate—your STEM adventure starts here!

## 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?** £39.98 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/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

- • **Effortless Organization:** Sturdy suitcase-style box with handle keeps your creative world neat and portable.
- • **Master STEM Skills Early:** Build 40 unique models that boost spatial reasoning, fine motor skills, and engineering insight.
- • **Interactive, Moving Models:** Create cars, airplanes, and more with parts that actually move—play meets real-world physics.
- • **Unleash Limitless Creativity:** 141 precision-engineered pieces snap securely for endless design possibilities.
- • **Designed for Young Innovators:** Easy-build parts tailored for ages 5+, making complex engineering concepts accessible and fun.

## Overview

The K'NEX 40 Model Building Set features 141 snap-fit pieces and an instruction booklet to create 40 unique, movable models. Designed for children ages 5 and up, it fosters STEM learning by enhancing fine motor skills, spatial reasoning, and engineering creativity. Packaged in a durable, portable storage box, this set combines educational value with hours of imaginative play.

## Description

Building with K'NEX is easier than ever, with the beginner 40 Model building set! Featuring all new easy-build parts that allow children ages 5 and up to have a frustration-free building experience. The new parts – a barbell shaped rod that easily sandwiches between 2 connectors, and a flat panel piece that provides structural support – were specifically designed to address the needs of younger builders, who can easily build 2 flat shapes and then connect them together into a 3-D creation! Plus, newly designed wheels pop right on – they'll be on the go in no time! This set contains 141 parts and easy-to-follow, step-by-step building instructions and ideas for 40 different models. Your little builder can also use the parts to design and create from their own imagination! Packaged in a sturdy suitcase-style box with a handle for easy clean-up and portable storage. Building with K'NEX supports a child's developmental growth and puts them on a path towards a better understanding of STEM subjects. As they fit the pieces together, they're developing spatial awareness and honing their fine motor and dexterity skills. Give your child the gift of creativity with K'NEX and think outside the blocks!

Review: Great product - My 8year old nephew loves this thing parents are going to buy more haha
Review: Imaginative play for hours of creative fun - Many options for diversified play. Appropriate for most children above age three, great fine motor practice. Model cards are helpful, but free play seems to be a more popular choice.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07PQTDGWR |
| Additional Features | Portable |
| Age Range Description | 5-12 years |
| Best Sellers Rank | #33,152 in Toys & Games ( See Top 100 in Toys & Games ) #965 in Toy Building Sets |
| Brand Name | K'NEX |
| Color | Multicolor |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.8 out of 5 stars 4,325 Reviews |
| Educational Objective | Motor Skills, Spatial Reasoning, STEM |
| Global Trade Identification Number | 00744476152107 |
| Included Components | 141 K'NEX Parts and Pieces, Instruction Booklet |
| Is Assembly Required | No |
| Item Dimensions | 12 x 3.5 x 8 inches |
| Item Type Name | building toy |
| Item Weight | 10.9 Ounces |
| Manufacturer | K'NEX |
| Manufacturer Maximum Age (MONTHS) | 96.0 |
| Manufacturer Minimum Age (MONTHS) | 60.0 |
| Manufacturer Part Number | 15210 |
| Manufacturer Warranty Description | Lifetime Warranty Against Manufacturer'S Defects |
| Material Type | Plastic |
| Model Name | Beginner 40 Model |
| Model Number | 15210 |
| Model Year | 2020 |
| Number of Pieces | 141 |
| Number of Players | 2 + |
| Operation Mode | Manual |
| Power Source | Manual |
| Set Name | Beginner 40 Model |
| Size | Mediano |
| Sub Brand | 29.99 |
| Subject Character | Auto |
| Target Audience | Boys |
| Theme | Creative Engineering |
| Toy Building Block Type | Interlocking Toy Building Block |
| UPC | 744476152107 887961266627 |
| Unit Count | 24.0 Count |

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product
*by A***W on February 28, 2026*

My 8year old nephew loves this thing parents are going to buy more haha

### ⭐⭐⭐⭐⭐ Imaginative play for hours of creative fun
*by J***H on December 31, 2025*

Many options for diversified play. Appropriate for most children above age three, great fine motor practice. Model cards are helpful, but free play seems to be a more popular choice.

### ⭐⭐⭐⭐⭐ Our Kiddos love these!
*by A***R on June 23, 2024*

These great toys provide hours of imaginative play for our kiddos, both the 5-year-old and 8-year-old have a great time! Educational Value: K'NEX toys are excellent for fostering creativity, problem-solving skills, and spatial awareness in children. They encourage STEM learning by allowing kids to explore basic engineering and architectural concepts in a fun and engaging way. Versatile Pieces: The set includes a wide variety of pieces, including rods, connectors, and wheels, which can be used to create an endless array of structures and models. This versatility keeps children engaged and allows them to bring their imaginative ideas to life.

## Frequently Bought Together

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

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-17*