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.

Cerropi Large Newtons Cradle Pendulum With 7 Balls Physics Perpetual

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Description

⚡ Swing into productivity with timeless physics flair!

GIFT READY ELEGANCE - Arrives in exquisite, shockproof packaging—ideal for impressing colleagues or inspiring young minds.
SCIENCE MEETS STYLE - A perfect desk centerpiece that intuitively demonstrates momentum and energy conservation—smart meets chic.
ENDLESS MOMENTUM MASTERY - Experience mesmerizing 50+ seconds of smooth, perpetual motion that captivates and calms.
STRESS BUSTING EXECUTIVE TOY - Transform your workspace with a sophisticated fidget that boosts focus and relieves tension effortlessly.
PREMIUM INDUSTRIAL CRAFTSMANSHIP - Built with 8mm chromed steel and 20mm steel balls for unmatched durability and sleek modern aesthetics.

The CERROPI Newton's Cradle Pendulum features 7 precision-aligned steel balls suspended on an 8mm chromed metal frame, delivering over 50 seconds of smooth oscillation. Designed with ultra-durable materials and nano-technology enhanced support, it serves as both a captivating executive desk toy and an intuitive educational tool demonstrating momentum and energy conservation. Perfectly packaged for gifting, it includes replacement parts and a cleaning cloth to maintain peak performance.

Specifications

ASIN	B07Y5S5YWR
Age Range Description	Adult/Kid
Best Sellers Rank	#16,645 in Toys & Games ( See Top 100 in Toys & Games ) #129 in Educational Science Kits
Brand Name	CERROPI
Color	Silver
Customer Reviews	4.5 4.5 out of 5 stars (1,474)
Educational Objective	Logical Thinking
Global Trade Identification Number	00715668926103
Included Components	1PC Newtons Cradle
Indoor Outdoor Usage	Indoor
Is Assembly Required	No
Item Dimensions	9.06 x 6.69 x 6.69 inches
Item Type Name	science-kits
Item Weight	1200 Grams
Manufacturer	CERROPI
Manufacturer Maximum Age (MONTHS)	720.00
Manufacturer Minimum Age (MONTHS)	60.00
Manufacturer Part Number	2057
Manufacturer Warranty Description	60 Day Warranty Against Manufacturer Defects
Material Type	Nylon, Steel, Wood
Model Number	2057
Number of Players	1
Operation Mode	Manual
Power Source	Manual
Set Name	Newton's Cradle with 7 Balls
Size	Large
Supported Battery Types	No batteries required
Theme	Physics
UPC	715668926103
Unit Count	1 Count

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₱9712

Duties & taxes included

In stock

Sold byAmazon PhilippinesDelivered 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 Philippines.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

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

1 month ago

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CERROPI Large Newtons Cradle Pendulum with 7 Balls, Physics Perpetual Motion Desk Toys for Office, Calm Down Fidgets, 50+ Sec Swingtime (Beech Base)

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