---
product_id: 735950227
title: "QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads)"
brand: "qlkunla"
price: "HK$1305"
currency: HKD
in_stock: false
reviews_count: 5
category: "Qlkunla"
url: https://www.desertcart.hk/products/735950227-qlkunla-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration
store_origin: HK
region: Hong Kong
---

# 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)

**Brand:** qlkunla
**Price:** HK$1305
**Availability:** ❌ Out of Stock

## Summary

> ⚡️ Swing into brilliance with every click — physics never looked this cool!

## Quick Answers

- **What is this?** QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) by qlkunla
- **How much does it cost?** HK$1305 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/735950227-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 colleagues, friends, or family.
- • **Physics in Motion:** Experience Newton’s third law live on your desk with flawless energy transfer.
- • **Stress-Relief Zen:** Watch mesmerizing perpetual motion that doubles as a meditative break from your busy day.
- • **Sleek Office Statement:** Elevate your workspace with a classy kinetic sculpture that sparks curiosity and conversation.
- • **STEM Education Essential:** Perfect hands-on tool to demonstrate momentum and energy conservation for all ages.

## Overview

The QLKUNLA Newtons Cradle features 7 stainless steel balls suspended on durable fishing lines within a solid beech wood frame, measuring a compact 5.7x5.7x4.7 inches. This desktop kinetic toy visually demonstrates Newton’s third law of motion and conservation of momentum, making it an elegant office decor piece, a stress-relieving gadget, and an educational STEM tool suitable for both adults and kids.

## 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: 良い。 - 良い。届くのに少し時間はかかるがものはいい。
Review: Toll - Alles gut.

## Features

- Gravity At Work :See before your eyes as the Newton Balls transfer fall and transfer weight across the gadget. Drop one ball or two balls. You can see the energy transfer in such an astounding way!
- Office Desk Decor :Show some character and express your love for science and physics with this decorating your office space. Can be meditative and fun to watch also!
- Educational & Classy :Experience the visual display of momentum. Use this in class and share with your friends and family the exciting world of physics and science!
- Perpetual Motion: The pendulum balls show the conservation of momentum and energy, creating perpetual motion,these swinging kinetic balls are perfect addition to your office desk decoration accessories or teaching tool at schools.
- Good Gift Idea: Suit for both kids and adults, excellent for learning science, killing boring time and releasing stress, which makes it a good present for birthday, holiday. Meanwhile, It’s not only a toy, but also a good desk decor. You can put it on your desk or shelf, and swing it anytime when you passing by, it will be a wonderful scenery in your home or office!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C7KRG6NP |
| Age Range (Description) | Adult, Kid |
| Age Range Description | Adult, Kid |
| Brand | QLKUNLA |
| Country of Origin | USA |
| Customer Reviews | 4.1 out of 5 stars 613 Reviews |
| Educational Objective | STEM |
| Included Components | Newton's pendulum X1 |
| Item Dimensions | 17 x 11.9 x 14.8 Centimeters |
| Item Weight | 1.17 Kilograms |
| Item dimensions L x W x H | 17 x 11.9 x 14.8 Centimeters |
| Manufacturer | QLKUNLA |
| Manufacturer Part Number | A-12 |
| Material | Beech |
| Maximum Recommended age | 960.00 |
| Minimum Recommended age | 36.00 |
| Model Number | A-12 |
| Size | 4.7 x 6.69 x 5.83 inches |
| Theme | Physics |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** QLKUNLA
- **Age Range (Description):** Adult, Kid
- **Item dimensions L x W x H:** 17 x 11.9 x 14.8 Centimeters
- **Item Weight:** 1.17 Kilograms
- **Assembly Required:** No

## Images

![QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) - Image 1](https://m.media-amazon.com/images/I/61tPipkRoHL.jpg)
![QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) - Image 2](https://m.media-amazon.com/images/I/61TAnD48jzL.jpg)
![QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) - Image 3](https://m.media-amazon.com/images/I/61y-uX5xTvL.jpg)
![QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) - Image 4](https://m.media-amazon.com/images/I/61pipZDXdXL.jpg)
![QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office(7 Beads) - Image 5](https://m.media-amazon.com/images/I/71wHDl1SrxL.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

### ⭐⭐⭐⭐⭐ 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。

### ⭐⭐⭐⭐⭐ Toll
*by S***R on 10 January 2026*

Alles gut.

### ⭐⭐⭐⭐⭐ Genial
*by R***P on 26 January 2026*

Tener un péndulo de Newton era un deseo de mi hijo, y estas navidades ha sido la ocasión perfecta. Había muchos modelos a elegir, y todos tenían algunas malas críticas que nos hicieron dudar en cual coger. Pero éste, ha sido todo un acierto. No es que dure mucho rato el movimiento ,pero a los padres, ya nos va bien que así sea..

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-18*