---
product_id: 515259745
title: "NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (Amazon Exclusive)"
brand: "blue marble"
price: "€ 89.47"
currency: EUR
in_stock: true
reviews_count: 8
category: "Blue Marble"
url: https://www.desertcart.ie/products/515259745-national-geographic-kids-fort-building-kit-135-piece-indoor-fort
store_origin: IE
region: Ireland
---

# flexible Flex-Tech hubs 135 versatile pieces durable premium poles NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (Amazon Exclusive)

**Brand:** blue marble
**Price:** € 89.47
**Availability:** ✅ In Stock

## Summary

> 🏰 Build your kingdom of creativity—because every kid deserves an epic fort!

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (Amazon Exclusive) by blue marble
- **How much does it cost?** € 89.47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/515259745-national-geographic-kids-fort-building-kit-135-piece-indoor-fort)

## Best For

- blue marble enthusiasts

## Why This Product

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

## Key Features

- • **STEM Learning Meets Play:** Hands-on experience with geometry, balance, and spatial reasoning disguised as fun.
- • **Grow & Innovate with Confidence:** Step-by-step guides empower kids to build classic designs before inventing their own.
- • **Build Epic Forts with 135 Pieces:** Unleash limitless creativity with a massive kit designed for endless configurations.
- • **Premium-Quality Durable Components:** Sturdy poles and clips built to withstand hours of imaginative play and rebuilds.
- • **Flex-Tech Hubs for Effortless Bending:** Innovative connectors that flex and hold tight, making complex shapes a breeze.

## Overview

The NATIONAL GEOGRAPHIC Kids Fort Building Kit is a 135-piece indoor construction set designed for children ages 6 to 12. Featuring flexible Flex-Tech hubs and durable poles, it enables endless fort-building possibilities that foster STEM skills like spatial reasoning and problem-solving. This premium-quality kit encourages creative, cooperative play and comes with easy-to-follow guides, making it perfect for young builders ready to innovate and explore.

## Description

desertcart.com: NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (desertcart Exclusive) : Toys & Games

Review: It's the NAT GEO we love. Educational and fun. - My buddies 7 year old loves this thing. Holy crap he loves this thing. He has forts everywhere he goes. Little dude is gonna be an engineer or an architect easily if that is the route he takes later in life. Until then, he is gonna keep having fun, and this is a part of it. -Parts plus extras were all there, and there are a ton. The blanket clips are flimsy, don't bother and just get some decent heavy general duty kind of spring loaded clamps from your hardware store or aisle. -This thing is fun to just take off on and let him work out how to make things stay standing up, and then stay up after he applies the blanket as a static load. -Overall quality is high. Nat Geo can get a little overboard with being chintzy sometimes, but this is not one of those times. -BYOB. Blanket y'all, blanket. Wouldnt be bad as a chill brew and book nook though. Might have to get little dude let me borrow it. But bring your own blanket, or tarp, or sheet, or even a branch roof if you feel squirrelly and creative. 10/10 rating from a 7 year old blur of finding out how things work.
Review: National Geographic Indoor Fort Building Kit: Hands-On STEM, Creativity, and Cooperative Play - As a special education teacher, I am always looking for toys that naturally build problem-solving, collaboration, and perseverance without feeling academic. I introduced the National Geographic Indoor Fort Building Kit (225 Pieces) to my 8-year-old nephew, and it has been one of the most engaging and developmentally supportive play sets we have used indoors. The open-ended design is the biggest strength. With rods and connectors that can be configured in countless ways, my nephew was able to plan, test, adjust, and rebuild his structures independently. From a special education perspective, this supports executive functioning skills such as planning, flexibility, and task persistence. When a structure didn’t work the first time, the kit encouraged trial-and-error rather than frustration. The STEM value is authentic and age-appropriate. Concepts like balance, stability, geometry, and spatial reasoning are explored naturally through play. My nephew began talking about which shapes were “stronger” and how to make walls taller without falling—clear evidence of applied learning. The pieces are lightweight but sturdy, making them easy for children to manipulate without adult assistance. Another major benefit is cooperative play. This kit works well for siblings, friends, or family members building together. It promotes communication, turn-taking, and shared problem-solving, which are essential social skills. Even when playing solo, my nephew remained engaged for long periods, often using blankets to turn his builds into forts or reading spaces. Cleanup and storage were also manageable. While there are many pieces, they are easy to stack and organize, and my nephew could help with cleanup—an important routine-building skill. The durability of the materials gives confidence that the set will hold up to repeated use. Overall, the National Geographic Indoor Fort Building Kit is an excellent investment in creative, hands-on learning. I would strongly recommend it to families, educators, and therapists looking for a screen-free STEM toy that supports creativity, problem-solving, and cooperative play—especially for children who benefit from tactile, construction-based learning experiences.

## Features

- BUILD THE COOLEST FORTS EVER - With 135 pieces, kids can build forts that are nothing less than epic! This fort building kit makes it easy to build an indoor fort with endless configurations. It's perfect for creative building and play!
- BENDABLE PIECES MAKE BUILDING EASY - The Flex-Tech hubs in this fort kit hold the poles tight and flex, allowing kids to build tents, castles, even dome-shaped forts! Kids can let their imaginations run wild as they construct the perfect play fort.
- DURABLE, PREMIUM-QUALITY COMPONENTS - Sturdy poles in two different lengths work with the Flex-Tech hubs to create a number of dynamic structures, with 6 included clips that make it easy to cover the fort with a sheet or blanket (not included).
- GROWS WITH YOUR KIDS – Kids will learn the basics of connecting pieces from the included Building Guide, including step-by-step instructions for building a pyramid and an airplane, so they can build with confidence before trying their own designs!
- HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BRTCPB6S |
| Age Range Description | 4 years and up |
| Best Sellers Rank | #28,672 in Toys & Games ( See Top 100 in Toys & Games ) #1,071 in Toy Building Sets |
| Brand Name | Blue Marble |
| Customer Reviews | 4.1 out of 5 stars 553 Reviews |
| Frame Material Type | Plastic |
| Included Components | Fort Building Kit Poles and Connectors |
| Is Assembly Required | No |
| Item Height | 3.68 inches |
| Item Type Name | Epic Fort Building Kit - 135-Piece Indoor Fort Builder for Kids |
| Item Weight | 6.8 Pounds |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Maximum Age (MONTHS) | 1188 |
| Manufacturer Minimum Age (MONTHS) | 48.00 |
| Material Type | Multiple |
| Size | One Size |
| Style | 135 Piece |
| Theme | Imaginative Play |
| UPC | 810070622107 |
| Unit Count | 1.0 Count |

## Images

![NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (Amazon Exclusive) - Image 1](https://m.media-amazon.com/images/I/814Yy8Q7VjL.jpg)
![NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (Amazon Exclusive) - Image 2](https://m.media-amazon.com/images/I/81bAkAMfAgL.jpg)
![NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (Amazon Exclusive) - Image 3](https://m.media-amazon.com/images/I/81kYzZqUf3L.jpg)
![NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (Amazon Exclusive) - Image 4](https://m.media-amazon.com/images/I/81mdkifatpL.jpg)
![NATIONAL GEOGRAPHIC Kids Fort Building Kit - 135-Piece Indoor Fort Builder, Creative Play, STEM Building Toys for Kids Ages 6 7 8 9 10 11 12, Blanket Fort (Amazon Exclusive) - Image 5](https://m.media-amazon.com/images/I/910QW48ui7L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ It's the NAT GEO we love. Educational and fun.
*by J***E on March 20, 2025*

My buddies 7 year old loves this thing. Holy crap he loves this thing. He has forts everywhere he goes. Little dude is gonna be an engineer or an architect easily if that is the route he takes later in life. Until then, he is gonna keep having fun, and this is a part of it. -Parts plus extras were all there, and there are a ton. The blanket clips are flimsy, don't bother and just get some decent heavy general duty kind of spring loaded clamps from your hardware store or aisle. -This thing is fun to just take off on and let him work out how to make things stay standing up, and then stay up after he applies the blanket as a static load. -Overall quality is high. Nat Geo can get a little overboard with being chintzy sometimes, but this is not one of those times. -BYOB. Blanket y'all, blanket. Wouldnt be bad as a chill brew and book nook though. Might have to get little dude let me borrow it. But bring your own blanket, or tarp, or sheet, or even a branch roof if you feel squirrelly and creative. 10/10 rating from a 7 year old blur of finding out how things work.

### ⭐⭐⭐⭐⭐ National Geographic Indoor Fort Building Kit: Hands-On STEM, Creativity, and Cooperative Play
*by M***S on January 10, 2026*

As a special education teacher, I am always looking for toys that naturally build problem-solving, collaboration, and perseverance without feeling academic. I introduced the National Geographic Indoor Fort Building Kit (225 Pieces) to my 8-year-old nephew, and it has been one of the most engaging and developmentally supportive play sets we have used indoors. The open-ended design is the biggest strength. With rods and connectors that can be configured in countless ways, my nephew was able to plan, test, adjust, and rebuild his structures independently. From a special education perspective, this supports executive functioning skills such as planning, flexibility, and task persistence. When a structure didn’t work the first time, the kit encouraged trial-and-error rather than frustration. The STEM value is authentic and age-appropriate. Concepts like balance, stability, geometry, and spatial reasoning are explored naturally through play. My nephew began talking about which shapes were “stronger” and how to make walls taller without falling—clear evidence of applied learning. The pieces are lightweight but sturdy, making them easy for children to manipulate without adult assistance. Another major benefit is cooperative play. This kit works well for siblings, friends, or family members building together. It promotes communication, turn-taking, and shared problem-solving, which are essential social skills. Even when playing solo, my nephew remained engaged for long periods, often using blankets to turn his builds into forts or reading spaces. Cleanup and storage were also manageable. While there are many pieces, they are easy to stack and organize, and my nephew could help with cleanup—an important routine-building skill. The durability of the materials gives confidence that the set will hold up to repeated use. Overall, the National Geographic Indoor Fort Building Kit is an excellent investment in creative, hands-on learning. I would strongly recommend it to families, educators, and therapists looking for a screen-free STEM toy that supports creativity, problem-solving, and cooperative play—especially for children who benefit from tactile, construction-based learning experiences.

### ⭐⭐⭐⭐ Fun activity
*by B***T on January 7, 2024*

Comes with easy to follow directions. The tubes have some flexibility and are light weight so it doesn’t build super sturdy. We built the fort pictured on the box and some of the tubes kept popping out. Overall a fun project activity, I would recommend it.

## Frequently Bought Together

- NATIONAL GEOGRAPHIC Creative Indoor Fort Building Kit - 135 Pieces for Kids Ages 6-12, STEM Building Toys for Imaginative Play, Blanket Fort (Amazon Exclusive)
- Molcey Blanket Fort Building Kit for Kids 4-8 8-12+ - Build a Fort Blankets - Ultimate Indoor/Outdoor Girls/Boys Toys Age 4-5 6 7 8-12 Year Old

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ie/products/515259745-national-geographic-kids-fort-building-kit-135-piece-indoor-fort](https://www.desertcart.ie/products/515259745-national-geographic-kids-fort-building-kit-135-piece-indoor-fort)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-27*