--- product_id: 425031864 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: "$181.94" currency: USD in_stock: true reviews_count: 9 category: "Mind Ware" url: https://www.desertcart.us/products/425031864-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building store_origin: US region: United States of America --- # 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:** $181.94 **Availability:** ✅ In Stock ## Summary > 🛠️ Build brilliance, spark curiosity, and watch ideas roll! ## 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?** $181.94 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/425031864-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 - • **All-In-One Creative Kit:** 178 planks plus balls, bell, bowling pin & toy car for endless innovation - • **Build Epic Chain Reactions:** Design tunnels, ramps & contraptions that trigger satisfying marble runs - • **Master STEM Concepts Hands-On:** Explore balance, leverage, geometry & physics through creative play - • **Screen-Free Fun That Inspires:** Engages kids 7+ in architecture & design, boosting focus & imagination - • **Premium Wood, No Fuss Assembly:** Stack perfectly every time—no glue or connectors needed ## Overview The MindWare KEVA Contraptions Reactions Planks Building Toy is a 191-piece wooden set featuring 178 precision-cut planks and unique accessories designed for kids aged 7 and up. It encourages STEM learning through hands-on construction of marble runs and chain reactions, requiring no glue or connectors. This premium, free-form building set fosters creativity, problem-solving, and architectural skills with an included idea book to inspire endless designs. ## Description Product description With no fixed rules or connectors, kids are free to experiment, envision new forms, and bring their creative ideas to life. Stacking the planks with precision requires hand-eye coordination, especially when aiming for taller or more intricate structures. Handling the solid pine planks strengthens fine motor skills as kids manipulate, place, and align the pieces. As children stack planks and explore different structural forms, they directly engage with concepts of physical balance and stability. How is the Contraptions Reactions set different from standard KEVA planks? Beyond 178 wooden planks, you get reaction pieces—bells, dowels, a bowling pin, string, balls, and more—to trigger chain-reaction events. How is the Contraptions Reactions set different from standard KEVA planks? Beyond 178 wooden planks, you get reaction pieces—bells, dowels, a bowling pin, string, balls, and more—to trigger chain-reaction events. What will my child learn? Hands-on lessons in balance, leverage, geometry, force and motion while they experiment with cause-and-effect. What will my child learn? Hands-on lessons in balance, leverage, geometry, force and motion while they experiment with cause-and-effect. Do the planks require glue? No, precision-cut wood stacks perfectly—kids can redesign contraptions endlessly. Do the planks require glue? No, precision-cut wood stacks perfectly—kids can redesign contraptions endlessly. What ages is it for? Suggested for ages 7 +—challenging enough for tweens but still safe and open-ended. What ages is it for? Suggested for ages 7 +—challenging enough for tweens but still safe and open-ended. Does it come with build ideas? Yes, a 16-page illustrated idea book jump-starts creative marble-run and chain-reaction challenges. Does it come with build ideas? Yes, a 16-page illustrated idea book jump-starts creative marble-run and chain-reaction challenges. Comparison chart – KEVA engineering Contraptions Reactions Contraptions Catapult Contraptions 50 Plank Set Contraptions Wood Blocks Models Monuments Structures 200 Maker Bot Maze Review: Creative toy - no batteries required - Was given as a gift to a 10 year old boy. 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: Great Gift for a kid - Great gift for a creative kid. ## 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 | | Additional Features | No glue or connectors required. | | Age Range Description | Baby | | Best Sellers Rank | #65,002 in Toys & Games ( See Top 100 in Toys & Games ) #1,904 in Toy Building Sets | | Brand Name | MindWare | | Customer Reviews | 4.6 out of 5 stars 77 Reviews | | Educational Objective | Team Building Skills | | Is Assembly Required | No | | Item Weight | 5.5 Pounds | | Manufacturer | MindWare | | Manufacturer Minimum Age (MONTHS) | 96.00 | | Manufacturer Part Number | 14100193 | | Material Type | Wood | | Model Number | 14100193 | | Number of Pieces | 178 | | Sub Brand | KEVA Contraptions | | Theme | Architecture | | Toy Building Block Type | Stacking Toy Building Block | | UPC | 195130261329 | ## 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) ![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 2](https://m.media-amazon.com/images/I/618BR6PNEjL.jpg) ![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 3](https://m.media-amazon.com/images/I/71+WfybzvbL.jpg) ![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 4](https://m.media-amazon.com/images/I/81ZHJPUfqxL.jpg) ![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 5](https://m.media-amazon.com/images/I/81dISjvx0hL.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 ### ⭐⭐⭐⭐⭐ Creative toy - no batteries required *by K***K on December 14, 2025* Was given as a gift to a 10 year old boy. 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. ### ⭐⭐⭐⭐⭐ Great Gift for a kid *by A***R on April 15, 2026* Great gift for a creative kid. ### ⭐⭐⭐⭐⭐ Fun building set for kids *by V***A on October 1, 2024* My 11 year old started building these blocks at his school and I decided to get him a set for his birthday. He is having so much fun with it. And I am glad it keeps him away from tv. Quality is great, it can be used in so many different constructions. Totally worth the price. ## 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.us/products/425031864-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building](https://www.desertcart.us/products/425031864-mindware-keva-contraptions-reactions-planks-building-toy-178-keva-building) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-20*