--- product_id: 1453132 title: "Newton's Cradle Art in Motion, 7 1/4-Inch Balance Balls - Black Wooden Base" brand: "sciencepurchase" price: "$20.74" currency: USD in_stock: false reviews_count: 13 url: https://www.desertcart.us/products/1453132-newtons-cradle-art-in-motion-7-1-4-inch-balance store_origin: US region: United States of America --- # 7.25" Size Elegant Design Kinetic Energy Newton's Cradle Art in Motion, 7 1/4-Inch Balance Balls - Black Wooden Base **Brand:** sciencepurchase **Price:** $20.74 **Availability:** ❌ Out of Stock ## Summary > ⚡ Swing into Science with Style! ## Quick Answers - **What is this?** Newton's Cradle Art in Motion, 7 1/4-Inch Balance Balls - Black Wooden Base by sciencepurchase - **How much does it cost?** $20.74 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/1453132-newtons-cradle-art-in-motion-7-1-4-inch-balance) ## Best For - sciencepurchase enthusiasts ## Why This Product - Trusted sciencepurchase brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Elegant Décor:** A sophisticated addition to your home or office that sparks conversation. - • **Educational Fun:** A playful way to engage youngsters in the wonders of physics. - • **Physics in Action:** Experience the principles of kinetic energy and momentum with every swing. - • **Stress Relief Tool:** Perfect for tuning out distractions and relieving stress during a busy day. - • **Quality Craftsmanship:** Constructed with high-quality materials for durability and style. ## Overview The BlastCase Newton's Cradle is a 7 1/4-inch kinetic sculpture that elegantly demonstrates the principles of physics, making it a perfect blend of art and education. With a sleek black wooden base and high-quality construction, it serves as both a stress-relief tool and a sophisticated conversation starter for any environment. ## Description The classic desk accessory is both art-in-motion and proof of Newton's Principle that "action and reaction are equal and opposite."Lift one of the 5 steel balls at either end and let it swing back--the ball at the other end will swing out the same distance as the one you lifted, proving the scientific theory and mesmerizing you for hours.Use it to waste time, relieve stress, tune out boring coworkers, or schooling youngsters in physics. Fair warning: it's totally addictive! 7.25". Review: I can play with it for hours at a time - This is the most awesome toy. I can play with it for hours at a time. It also helps me calm down when I get upset. My doctor recommended it along with some fidget toys so I stop picking at my fingers. Anyway, I found that if you get too carried away the strings can become tangled. So be careful. It's best to just play with it on your bed and not carry it around. Warning, the soft clicking of the metal balls irritates some people when they watch TV. The noise doesn't bother me at all but my si-fi friends, Randy and Kyle get all upset every time I pull this out during our Battlestar Galactica marathons. Review: good quality - Purchased this for my grandson. Choose this one after reading the reviews. So many were not happy with the cheaper ones you can get. This one has a good weight to the balls so it stays in motion longer. Nice quality. I am very happy with it and my grandson was so excited to receive it for his 7th birthday. ## Features - Plastic - Imported - Newton's Cradle is a fun demonstration of physics in action and demonstrates the principles of kinetic energy and conservation of momentum - Elegant conversation piece for home or at the office - High quality construction - Neatly packed and secured in place to ensure that the strings are not tangled upon arrival - Use it to waste time, relieve stress, tune out boring coworkers, or schooling youngsters in physics ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 3.4 out of 5 stars 232 Reviews | ## Images ![Newton's Cradle Art in Motion, 7 1/4-Inch Balance Balls - Black Wooden Base - Image 1](https://m.media-amazon.com/images/I/61r6NGTTBvL.jpg) ![Newton's Cradle Art in Motion, 7 1/4-Inch Balance Balls - Black Wooden Base - Image 2](https://m.media-amazon.com/images/I/61ycDWOhLcL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ I can play with it for hours at a time *by 2***S on May 15, 2015* This is the most awesome toy. I can play with it for hours at a time. It also helps me calm down when I get upset. My doctor recommended it along with some fidget toys so I stop picking at my fingers. Anyway, I found that if you get too carried away the strings can become tangled. So be careful. It's best to just play with it on your bed and not carry it around. Warning, the soft clicking of the metal balls irritates some people when they watch TV. The noise doesn't bother me at all but my si-fi friends, Randy and Kyle get all upset every time I pull this out during our Battlestar Galactica marathons. ### ⭐⭐⭐⭐⭐ good quality *by T***R on May 9, 2014* Purchased this for my grandson. Choose this one after reading the reviews. So many were not happy with the cheaper ones you can get. This one has a good weight to the balls so it stays in motion longer. Nice quality. I am very happy with it and my grandson was so excited to receive it for his 7th birthday. ### ⭐ It sucks opening up something new *by M***N on December 30, 2014* Got this for my son for Christmas. Read some of the reviews and was aware that some said this was a cheap product and had problems with the strings. Knowing some people had issues with this right out of the box, we carefully opened it, only to find the middle ball completely broke off....not by the string but the little metal cylinder that the string loops through was not attached to the ball, broken right at the solder point. It sucks opening up something new, only to find it already broken. Would not recommend buying this product. --- ## 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/1453132-newtons-cradle-art-in-motion-7-1-4-inch-balance](https://www.desertcart.us/products/1453132-newtons-cradle-art-in-motion-7-1-4-inch-balance) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-15*