i thought the entire purpose was to stay in motion until stopped . do they stop on their own?

yes, they will do stop on their own after 50-60 seconds

Does this thing get rusted?

No. We have had ours for a few years now and it is still in like new condition. No rust

What is the length? The title states 11" while the product descriptions specifies 9".

The length of the marble base is 9.06 inches, the width is 6.69 inches, and the diagonal length of the marble base is about 11 inches.

we had one before from a mall and the balls were tangled so we couldn't use it does this one have the balls where they don't tangle ?

The one I ordered through Amazon was packaged very carefully with each ball and string wrapped in plastic. The strings were not tangled. The unit has not tangled; the balls are heavy weight and seem to be good quality. I am sorry that you had that experience. I enjoy the cradle so much; it is intriguing.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

CERROPI Newton Cradle Balance Balls, Newton Pendulum with 7 Balls, Classic Newton Swing Ball, Science Physics Gadget | Desk Toys & Accessories, 50+ Sec Swingtime, Marble Base, Black

Product ID: 283307001

Details

Size
M
Brand
CERROPI
Theme
Home Decor
Age range (description)
Adult/Kid
Item dimensions L x W x H
23 x 17 x 17

⏳50+ sec ultra-long swing time

🧵Nano-tech ultra-thin durable nylon strings

⚙️7 precision bearing steel balls + spare

151807CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

Description

🌀 Elevate your desk game with the ultimate kinetic art piece!

NANO TECH NYLON STRINGS - Engineered with cutting-edge nano technology for ultra-thin yet incredibly durable swing lines that ensure flawless oscillation.
HASSLE FREE SETUP WARRANTY - Comes with a silky cleaning cloth, easy maintenance guide, and a 12-month warranty for worry-free enjoyment.
MESMERIZING 50 SECOND SWING - Experience the longest, smoothest pendulum motion that captivates your desk and mind alike.
PRECISION BEARING STEEL BALLS - Seven perfectly balanced 20mm steel balls deliver satisfying kinetic energy transfer with an extra spare included.
ELEGANT MARBLE BASE CHROME FRAME - A sleek, modern design crafted with premium marble and chromed steel elevates your workspace aesthetic.

The CERROPI Newton Cradle features 7 precision bearing steel balls suspended on nano-technology nylon strings, delivering an ultra-long 50+ second swing time. Set on a stylish marble base with a chromed steel frame, this executive desk toy combines scientific intrigue with elegant design. Perfect for enhancing focus, sparking conversation, and adding a sophisticated touch to any professional workspace.

Specifications

ASIN	B082CNJXXF
Age Range Description	Adult/Kid
Best Sellers Rank	#17,897 in Toys ( See Top 100 in Toys ) #218 in Educational Science Kits
Brand Name	CERROPI
Color	Black
Customer Reviews	4.6 4.6 out of 5 stars (476)
Educational Objective	Logical Thinking
Included Components	1PC Newtons Cradle
Indoor Outdoor Usage	Indoor
Is Assembly Required	No
Item Dimensions	23 x 17 x 17 centimeters
Item Type Name	science-kits
Item Weight	2200 Grams
Manufacturer	CERROPI
Manufacturer Part Number	2056
Manufacturer recommended age	5 years and up
Material Type	Marble
Model Number	2056
Number of Players	1
Operation Mode	Manual
Power Source	battery_powered
Size	M
Subject Character	home decor
Supported Battery Types	No batteries required
Theme	Home Decor
UPC	715668938236 746653837340 745245575738
Unit Count	77.6027 Grams

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

151807CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

View all Trustpilot reviews