---
product_id: 455490723
title: "Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office"
brand: "qlkunla"
price: "¥7870"
currency: JPY
in_stock: true
reviews_count: 13
category: "Qlkunla"
url: https://www.desertcart.jp/products/455490723-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration-kinetic
store_origin: JP
region: Japan
---

# 1.12 lbs perfect desktop weight Perpetual kinetic motion demo 5.6x4.7x5.7 in compact design Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office

**Brand:** qlkunla
**Price:** ¥7870
**Availability:** ✅ In Stock

## Summary

> ⚡ Master momentum, mesmerize your desk!

## Quick Answers

- **What is this?** Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office by qlkunla
- **How much does it cost?** ¥7870 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/455490723-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration-kinetic)

## 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 fun, learning, and style for home or office.
- • **Physics in Motion:** Watch momentum and energy transfer live—no batteries needed!
- • **Educational Powerhouse:** Perfect for sparking curiosity in physics for all ages, from kids to pros.
- • **Stress-Relief Kinetics:** Soothe your mind with mesmerizing, perpetual swinging balls.
- • **Executive Desk Statement:** Elevate your workspace with a sleek, science-inspired decor piece.

## Overview

The QLKUNLA Newtons Cradle is a compact, 1.12-pound kinetic desktop toy that visually demonstrates the conservation of momentum and energy through perpetual swinging balls. Ideal for office decor, educational use, and stress relief, it’s a stylish, battery-free gadget that captivates science enthusiasts and professionals alike.

## Description

desertcart.com: QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office : Toys & Games

Review: Great science learning - Very nice but beware of tangling nylon cords if used with too young of child. I recommend this for 8 yr old and up.
Review: Good toy and teaching tool - Great teaching tool for “conservation of energy”. Also, a fun tool. NO BATTERIES NEEDED!!

## 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 | B0B253HMYK |
| Best Sellers Rank | #5,324 in Toys & Games ( See Top 100 in Toys & Games ) #30 in Executive Desk Toys |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,899) |
| Item Weight | 1.12 pounds |
| Item model number | A-09 |
| Manufacturer | QLKUNLA |
| Manufacturer recommended age | 3 years and up |
| Product Dimensions | 5.6 x 4.7 x 5.7 inches |

## Images

![Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office - Image 1](https://m.media-amazon.com/images/I/61XyO69K0ML.jpg)

## Available Options

This product comes in different **Edition** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great science learning
*by A***R on July 23, 2025*

Very nice but beware of tangling nylon cords if used with too young of child. I recommend this for 8 yr old and up.

### ⭐⭐⭐⭐⭐ Good toy and teaching tool
*by R***. on January 16, 2026*

Great teaching tool for “conservation of energy”. Also, a fun tool. NO BATTERIES NEEDED!!

### ⭐⭐⭐⭐⭐ Relaxing item
*by L***N on January 10, 2026*

It's smaller then I thought it would be but still looks and works great.

## Frequently Bought Together

- QLKUNLA Newtons Cradle Balance Balls Science Physics Gadget Desktop Decoration Kinetic Motion Toy for Home and Office
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**Shop now:** [https://www.desertcart.jp/products/455490723-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration-kinetic](https://www.desertcart.jp/products/455490723-newtons-cradle-balance-balls-science-physics-gadget-desktop-decoration-kinetic)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-01*