--- product_id: 773960198 title: "National Geographic Jumbo Cardboard Building Blocks – 30-Pc. Extra-Thick Cardboard Bricks for Kids, Build a Castle Play House, Indoor Playhouse, Large Building Blocks, Kids Giant Blocks" brand: "blue marble" price: "$148.20" currency: USD in_stock: true url: https://www.desertcart.us/products/773960198-national-geographic-jumbo-cardboard-building-blocks-30-pc-extra-thick store_origin: US region: United States of America --- # 30-piece jumbo castle set Includes educational Learning Guide Durable, secure interlocking blocks National Geographic Jumbo Cardboard Building Blocks – 30-Pc. Extra-Thick Cardboard Bricks for Kids, Build a Castle Play House, Indoor Playhouse, Large Building Blocks, Kids Giant Blocks **Brand:** blue marble **Price:** $148.20 **Availability:** ✅ In Stock ## Summary > 🏰 Build big, learn bigger — the castle of your kid’s dreams awaits! ## Quick Answers - **What is this?** National Geographic Jumbo Cardboard Building Blocks – 30-Pc. Extra-Thick Cardboard Bricks for Kids, Build a Castle Play House, Indoor Playhouse, Large Building Blocks, Kids Giant Blocks by blue marble - **How much does it cost?** $148.20 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/773960198-national-geographic-jumbo-cardboard-building-blocks-30-pc-extra-thick) ## 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 - • **Learn While You Play:** Comes with a full-color Learning Guide to spark curiosity about castles and history. - • **Award-Winning Quality:** From Blue Marble, Toy of the Year winner, trusted for safe, durable, and educational play. - • **Build Your Dream Castle:** 30 extra-thick jumbo blocks let kids create custom castles with ease and endless creativity. - • **Complete Royal Experience:** Includes a drawbridge and two crowns to inspire imaginative kingdom leadership. - • **Frustration-Free Assembly:** Blocks lock securely without glue or tools, ensuring smooth, stress-free building sessions. ## Overview National Geographic Jumbo Cardboard Building Blocks is a 30-piece set featuring extra-thick, lightweight cardboard bricks designed for kids to build their own castle playhouse. The kit includes 27 blocks in various shapes, a drawbridge, two crowns, and an educational Learning Guide. Blocks interlock securely for frustration-free assembly, promoting creativity and hands-on learning. Developed by award-winning Blue Marble, this durable, safe, and educational toy encourages imaginative play and historical curiosity. ## Description National Geographic Jumbo Cardboard Building Blocks – 30-Pc. Extra-Thick Cardboard Bricks for Kids, Build a Castle Play House, Indoor Playhouse, Large Building Blocks, Kids Giant Blocks ## Features - BUILD YOUR OWN CASTLE - The jumbo building blocks in this kit sport a castle theme, so kids can build their very own castle play house! Kids can let their creativity shine as they create unique, custom castles with ease! - SAFE, SECURE, AND DURABLE - These blocks are designed to hold together securely when assembled, eliminating frustration! Made from durable cardboard, they're also safe, lightweight, and durable so kids can explore any design they can think of! - ENDLESS BUILDING POSSIBILITIES - These high-quality building blocks are a great way for kids to explore their creativity as they design and build their very own castle play house! They'll also learn about castles with the included Learning Guide! - EVERYTHING INCLUDED - Kids can build the ultimate castle playhouse with the components in this kit! In addition to 27 blocks in different shapes and sizes, they'll get a drawbridge and two crowns to faithfully lead their new kingdom! - AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience! ## Technical Specifications | Specification | Value | |---------------|-------| | Item Weight | 6.31 Pounds | | Is assembly required | No | | Number of pieces | 30 | | Batteries required | No | | Included components | 2 crowns, 27 jumbo building blocks for kids, Drawbridge, Full Color Learning Guide | ## Product Details - **Brand:** Blue Marble - **Age Range (Description):** 3 years and up - **Color:** Blue - **Theme:** Castles - **Cartoon Character:** Castles ## Images ![National Geographic Jumbo Cardboard Building Blocks – 30-Pc. Extra-Thick Cardboard Bricks for Kids, Build a Castle Play House, Indoor Playhouse, Large Building Blocks, Kids Giant Blocks - Image 1](https://m.media-amazon.com/images/I/91Hw8SsYVqL.jpg) ## Available Options This product comes in different **Style** options. ## Frequently Bought Together - National Geographic Jumbo Cardboard Building Blocks – 30-Pc. Extra-Thick Cardboard Bricks for Kids, Build a Castle Play House, Indoor Playhouse, Large Building Blocks for Kids, Kids Giant Blocks - NATIONAL GEOGRAPHIC Clay Dinosaur Arts & Crafts Kit - Dinosaur Air Dry Clay for Kids with 5 Clay Colors, 5 Dino Skeletons & Googly Eyes, Dinosaur Activity for Girls and Boys Ages 4 5 6 7 8 9 & 10 --- ## 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.us/products/773960198-national-geographic-jumbo-cardboard-building-blocks-30-pc-extra-thick](https://www.desertcart.us/products/773960198-national-geographic-jumbo-cardboard-building-blocks-30-pc-extra-thick) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-10*