--- product_id: 550776434 title: "QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) (7 Beads)" brand: "qlkunla" price: "¥10785" currency: JPY in_stock: true reviews_count: 6 category: "Qlkunla" url: https://www.desertcart.jp/products/550776434-qlkunla-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration store_origin: JP region: Japan --- # Compact 5.7x5.7x4.7 inch size Solid beech wood frame 7 precision stainless steel balls QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) (7 Beads) **Brand:** qlkunla **Price:** ¥10785 **Availability:** ✅ In Stock ## Summary > ⚡ Swing into science — where style meets momentum! ## Quick Answers - **What is this?** QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) (7 Beads) by qlkunla - **How much does it cost?** ¥10785 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/550776434-qlkunla-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration) ## Best For - qlkunla enthusiasts ## Why This Product - Trusted qlkunla brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Gift of Genius:** A thoughtful present blending science, style, and stress relief for all ages. - • **Physics in Motion:** Experience the mesmerizing transfer of momentum and energy with every swing. - • **STEM Learning Made Fun:** Perfect for educators and curious minds to visualize Newton’s third law in action. - • **Sleek Office Statement:** Elevate your workspace with a classy, kinetic desk accessory that sparks conversation. - • **Stress-Busting Kinetics:** Turn idle moments into calming, meditative breaks that boost focus and creativity. ## Overview The QLKUNLA Newtons Cradle features 7 stainless steel balls suspended on durable fishing lines within a solid beech wood frame, demonstrating Newton’s third law of motion through kinetic energy transfer. Compact and elegant at 5.7x5.7x4.7 inches, it serves as both an educational STEM tool and a sophisticated desktop decoration, ideal for stress relief and sparking curiosity in home or office environments. ## Description Newtons Cradle: Newtoncradle demonstrates the third law of motion with swinging spheres; when oneball is lifted and released it sends force through the rest, pushing the endball in the opposite direction; these swinging kinetic balls are perfectaddition to your office desk decoration accessories or teaching tool at schools Specifications: Size: 5.7x5.7x4.7 in Material: Solid wood+ Fishing line+ Stainless steel balls &structure Occasions: Science Education supplies, Psychotherapy, Stress release,Leisure and entertainment, Birthday present, Holiday gifts, Business gifts Warm Prompt: 1.When you use thisnewton’s cradle, please move it in a horizontal line, so the lines will not betangled. 2.The ball in order from the outside to the inside, one by one from the inside of the foam to remove one by one, take special care not to tangle the line together! 3.If it was tangled,you could untangle it still with some patience and time, then you will fix it.It’s also a challenge for you, why not have a try? How to untangle it:Firstly, please figure out how the wires were tangled, then follow the wires tountangle it, and you can untangle it in few mins. Review: Ok - Works. Shame no auto supply Review: Great science learning - Very nice but beware of tangling nylon cords if used with too young of child. I recommend this for 8 yr old and up. ## Technical Specifications | Specification | Value | |---------------|-------| | Age range (description) | Kid | | Brand | QLKUNLA | | Item dimensions L x W x H | 17 x 11.9 x 14.8 centimeters | | Item weight | 1.17 Kilograms | | Size | 4.7 x 6.69 x 5.83 inches | | Theme | Physics | ## Product Details - **Age range (description):** Kid - **Brand:** QLKUNLA - **Item dimensions L x W x H:** 17 x 11.9 x 14.8 centimeters - **Size:** 4.7 x 6.69 x 5.83 inches - **Theme:** Physics ## Images ![QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) (7 Beads) - Image 1](https://m.media-amazon.com/images/I/61tPipkRoHL.jpg) ## Questions & Answers **Q: Will this keep going all day with out stopping? I need it to keep going all day to trick my thermostat that there is someone home ?** A: This isn't a perpetual motion device. It will stop after about a minute. Friction has its way. **Q: is the base wood some say it is not** A: It's not wood, it's plastic. ## Customer Reviews ### ⭐⭐⭐⭐ Ok *by A***. on 3 August 2025* Works. Shame no auto supply ### ⭐⭐⭐⭐⭐ Great science learning *by A***R on 23 July 2025* Very nice but beware of tangling nylon cords if used with too young of child. I recommend this for 8 yr old and up. ### ⭐⭐⭐⭐⭐ 良い。 *by て***ー on 8 December 2025* 良い。届くのに少し時間はかかるがものはいい。 ## Frequently Bought Together - QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) (7 Beads) - JOEYANK Fidget Cube New Version Fidget Finger Toys - Metal Infinity Cube Prime for Stress and Anxiety Relief/ADHD, Ultra Durable Sensory Gifts for Adults and Teens Kids - Fidget Toys Adult, Gravity Defying Kinetic Desk Toy, Metal ADHD Silent Fidget Toy Spinner, Balance Desk Toys for Office for Adults, Party Favors, Birthday (Gray-Rose Gold Ball) --- ## 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.jp/products/550776434-qlkunla-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration](https://www.desertcart.jp/products/550776434-qlkunla-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-07*