--- product_id: 743667124 title: "MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up" brand: "mindware" price: "€ 152.76" currency: EUR in_stock: true reviews_count: 5 category: "Mind Ware" url: https://www.desertcart.hr/products/743667124-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building store_origin: HR region: Croatia --- # Create dynamic marble runs & chain reactions Includes 16-page illustrated idea book 178 precision-cut wooden planks MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up **Brand:** mindware **Price:** € 152.76 **Availability:** ✅ In Stock ## Summary > 🛠️ Build, bounce, and wow—where STEM meets endless fun! ## Quick Answers - **What is this?** MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up by mindware - **How much does it cost?** € 152.76 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/743667124-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building) ## Best For - mindware enthusiasts ## Why This Product - Trusted mindware 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 physics, balance, leverage, and geometry designed to spark curiosity in kids 7+ and adults alike. - • **Precision-Crafted Quality:** Premium wood planks stack flawlessly every time, ensuring stability and durability for hours of purposeful play. - • **All-in-One Contraption Kit:** Includes reaction balls, bell, bowling pin, toy car, and dowels to craft unique interactive marble runs. - • **Family & Classroom Favorite:** Ideal for team-building, educational activities, and creative bonding moments—turn learning into an unforgettable experience. - • **Limitless Creative Engineering:** Build stunning structures and complex chain reactions with 178 perfectly milled planks—no glue or connectors needed. ## Overview MindWare KEVA Contraptions Reactions is a 191-piece wooden building set featuring 178 precision-cut planks and interactive components to create marble runs and chain reactions. Designed for ages 7 and up, it fosters STEM skills like physics and engineering through hands-on play without the need for glue or connectors. The set includes an illustrated idea book and versatile pieces such as reaction balls, a bell, and a bowling pin, making it perfect for family fun, educational use, and creative exploration. ## Description The simplicity of KEVA planks allows limitless possibilities! With KEVA, every piece is precision-milled, so they are all exactly the same and stack with unbelievable stability. Teachable Moments KEVA teaches a basic understanding of physics and engineering concepts. Physically handling the blocks builds a fundamental understanding of quantities, equality, geometry, balance and design. Each kit includes an idea book with concepts to stimulate builders. Easy to Use No glue or connectors required! Simply stack the solid KEVA planks to create buildings, monuments and geometric forms. All Ages Loved by boys and girls as young as 5 and as old as 100. All KEVA kits are compatible! KEVA is simple enough for easy builds and more complex designs. Adults can't resist getting in on the fun! Children of all ages can be challenged and successful when building with KEVA planks—it is the perfect family activity! Purposeful Play The KEVA Educator's Manual is loaded with lesson plans and classroom activities, and each kit's included guides shows you how to add a hands-on component to math, science, reading, social studies, and other subjects. Review: Was well worth the cost ! So many ways to use he is constantly building something different . I thought pricey however solid high quality and excellent alternative to his Lego ! Review: Was given as a gift. He loved building and creating with it. It has a lot of materials in a small box. Was surprised when he created a domino run almost 12 feet long. ## Features - STEM Toys That Teach: These KEVA blocks help kids gain first-hand experience with balance, leverage, geometry and the principles of physics while fostering an interest in architecture and design - Create Chain Reactions: Use the wooden building planks to build a marble run full of tunnels, ramps and other contraptions, then see if your KEVA ball sets off chain reactions like knocking over a bowling pin or ringing a bell - Unique Plank Building Block Set: This wood building set features traditional KEVA planks along with colored building planks and unique pieces to create one-of-a-kind KEVA ball run structures - No Hassle: These premium KEVA STEM planks are precision-cut from beautiful wood to stack perfectly time after time, no glue or connectors needed; simply unpack and build impressive KEVA structures - KEVA Contraptions Reactions includes 178 wooden planks for building, 8 dowels, 2 reaction balls, 1 bell, 1 string, 1 bowling pin, 1 toy car and a 16-page illustrated idea book (Ages 7 and up) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09J69CHVP | | Assembly Required | No | | Batteries Required? | No | | Best Sellers Rank | #123,408 in Toys ( See Top 100 in Toys ) #5,505 in Toy Building Sets | | Color | Colored | | Customer Reviews | 4.7 4.7 out of 5 stars (64) | | Date First Available | 24 June 2025 | | Educational Objective(s) | Team Building Skills | | Manufacturer recommended age | 8 years and up | | Manufacturer reference | 14100193 | | Material Type(s) | Wood | | Number of Puzzle Pieces | 178 | | Package Dimensions | 37.39 x 24.61 x 8.61 cm; 2.33 kg | ## Images ![MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up - Image 1](https://m.media-amazon.com/images/I/71e1Qp3SLvL.jpg) ## Questions & Answers **Q: How is the Contraptions Reactions set different from standard KEVA planks?** A: Beyond 178 wooden planks, you get reaction pieces—bells, dowels, a bowling pin, string, balls, and more—to trigger chain-reaction events. **Q: What will my child learn?** A: Hands-on lessons in balance, leverage, geometry, force and motion while they experiment with cause-and-effect. **Q: Do the planks require glue?** A: No, precision-cut wood stacks perfectly—kids can redesign contraptions endlessly. **Q: What ages is it for?** A: Suggested for ages 7 +—challenging enough for tweens but still safe and open-ended. **Q: Does it come with build ideas?** A: Yes, a 16-page illustrated idea book jump-starts creative marble-run and chain-reaction challenges. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***T on 14 June 2024* Was well worth the cost ! So many ways to use he is constantly building something different . I thought pricey however solid high quality and excellent alternative to his Lego ! ### ⭐⭐⭐⭐⭐ Review *by K***K on 14 December 2025* Was given as a gift. He loved building and creating with it. It has a lot of materials in a small box. Was surprised when he created a domino run almost 12 feet long. ### ⭐⭐⭐⭐⭐ Review *by A***R on 21 June 2025* Why did you pick this product vs others?: Requested by 6-year old Grandson. He and his Dad have been working on it together. They've been having a lot of fun with it. He's beginning to build it on his own now. ## Frequently Bought Together - MindWare KEVA Contraptions Reactions Planks Building Toy - 178 KEVA Building Planks (191 Piece Set) - Free-Form Wood Building Set for Kids to Create Their Own Ball Maze – Ages 7 & Up - KEVA Structures 200 Wood Building Planks Set - Building Toy Includes 200 Wooden Blocks and Idea Book - Ages 5 and Up - MindWare Keva Brain Builders Deluxe: STEM Building Toy Includes 75 KEVA Planks, 40 Puzzle Cards, 8 Design Cards, 3D Building Skills for Kids - Ages 7+ --- ## 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.hr/products/743667124-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building](https://www.desertcart.hr/products/743667124-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-25*