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.

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

NANO TECH DURABILITY - Ultra-thin, high-impact nylon lines crafted with cutting-edge nano technology for lasting performance.
NO BATTERIES NO FUSS - Pure kinetic energy in motion—no batteries or assembly required, just instant zen.
SLEEK BEECH WOOD BASE - Elegant, natural beech wood base adds a sophisticated touch to your desk or office.
BOOST FOCUS CREATIVITY - A timeless executive desk toy that sharpens numeracy, spatial awareness, and inspires innovative thinking.
MESMERIZING 50 60 SECOND SWING - Experience the longest, smoothest oscillation that captivates and calms your workspace.

The CERROPI 7 Balls Newton's Cradle features a premium beech wood base and nano-technology reinforced nylon swing lines, delivering an unparalleled 50-60 second swing time. Designed for ages 5 and up, this battery-free executive desk toy enhances focus, creativity, and spatial awareness with effortless, mesmerizing motion.

€ 175.59

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Ayesha M.

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

5 days ago

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Product Dimensions	23.01 x 16.99 x 16.99 cm; 1.2 kg
Manufacturer recommended age	5 years and up
Item model number	2057
Manufacturer's Suggested Maximum Weight	1.56 Kilograms
Educational Objective(s)	Numeracy & Spacial Awareness
Language:	English
Number of Game Players	1
Assembly Required	No
Batteries Required?	No
Batteries included?	No
tech_spec_battery_description_toys	No batteries required
Material Type(s)	Nylon, Steel
Remote Control Included?	No
ASIN	B07Y5S5YWR

CERROPI7 Balls Newton's Cradle -11 Inch (Beech Base)

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