---
product_id: 555372906
title: "Sunny Days Entertainment Nucleus Expandable Ball - Breathing Toy - Ages 3+"
brand: "sunny days entertainment"
price: "¥5884"
currency: JPY
in_stock: true
reviews_count: 9
category: "Sunny Days Entertainment"
url: https://www.desertcart.jp/products/555372906-sunny-days-entertainment-nucleus-expandable-ball-breathing-toy-ages-3
store_origin: JP
region: Japan
---

# Vibrant rainbow geometric design Lightweight 1.6 oz, portable & durable Expands 5.5” to 10” diameter Sunny Days Entertainment Nucleus Expandable Ball - Breathing Toy - Ages 3+

**Brand:** sunny days entertainment
**Price:** ¥5884
**Availability:** ✅ In Stock

## Summary

> 🌟 Expand your calm, compress your stress—play smarter, feel better!

## Quick Answers

- **What is this?** Sunny Days Entertainment Nucleus Expandable Ball - Breathing Toy - Ages 3+ by sunny days entertainment
- **How much does it cost?** ¥5884 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/555372906-sunny-days-entertainment-nucleus-expandable-ball-breathing-toy-ages-3)

## Best For

- sunny days entertainment enthusiasts

## Why This Product

- Trusted sunny days entertainment brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable & Safe:** Made with non-toxic, tough plastic built to withstand hours of energetic play.
- • **Stress-Free Focus:** Breath-powered expansion soothes anxiety and sharpens concentration anytime, anywhere.
- • **Transform Your Play:** From compact star to giant sphere—endless tactile fun for focus and stress relief.
- • **Colorful Social Magnet:** Bright rainbow hues make it a standout gift and conversation starter at any gathering.
- • **On-the-Go Entertainment:** Ultra-lightweight and portable—perfect for busy professionals and kids on the move.

## Overview

The Sunny Days Entertainment Nucleus Expandable Ball is a lightweight, hand-powered sensory toy that expands from 5.5 to 10 inches in diameter. Crafted from durable, non-toxic plastic with a vibrant rainbow geometric design, it offers hours of tactile fun to improve focus, relieve anxiety, and keep hands busy. Ideal for kids ages 3+ and adults alike, it’s a portable stress-relief tool and playful fidget toy perfect for home, office, or on-the-go.

## Description

Push, pull, roll or toss the Nucleus Expandable Ball to watch it shrink and grow! With bright rainbow colors and geometric shape, this lightweight toy starts at 5.5” and expands to 10” in diameter! Open the Expandable Ball to a giant sphere and play a game of catch with friends or transform it into a small geometric star and use it as a tactile fidget toy for hours of entertainment. The fidget sphere can also be used as a tool to soothe anxiety and improve concentration by shrinking and growing with your breath to increase focused thoughts, calm down or soothe anxiety. Whether for fun or focus, you can endlessly reuse this long-lasting toy that is perfect for keeping hands busy and relieving stress! Designed with durable, non-toxic materials, the Nucleus Expandable Ball is perfect on-the-go fidget fun for adults and children ages 3 and up!

Review: Endless Fun in Every Expand 🌈 - This expandable ball has been a favorite in our home for years, and it truly stands the test of time. It’s colorful, beautiful, and instantly grabs attention the moment kids see it. Multiple children of different ages have played with it over the years, and it still holds up amazingly well—proof of its outstanding quality. What I love most is that you can’t get bored with it. There are endless ways to play and create fun, imaginative games, and it somehow manages to entertain everyone—including adults. It’s perfect for multiple age groups, making it a go-to toy for playdates, family gatherings, and everyday fun. The durability and design make it well worth it, and it’s easily one of those toys that never gets put away because it’s always being used. You also don’t have to put it together, so who doesn’t love that!
Review: Works Perfectly - I keep this in my office in a school. Kids love to play with it. We use it to teach deep breathing. It has held up for over a year. Excellent value. Easy to use.

## Features

- BREATHING BALL: With the Nucleus Expandable Ball, it's hours of fun to pull, push, roll and toss Measuring 10 inches in diameter when fully opened, there’s so much sensory fun to be had.
- SENSORY PLAY: The perfect fidget toy to help kids create some laughs and relieve stress. Great for keeping hands busy, soothing anxiety, increasing focus, and having fun.
- LIGHTWEIGHT and PORTABLE: A lightweight design and expandable shape make it easy to bring your favorite fidget toy with you. Take the Nucleus Expandable Ball anywhere for on-the-go fun.
- SAFE and DURABLE DESIGN: This expandable ball is made of durable, non-toxic material for long lasting use, and its shape allows it to withstand tough play.
- GREAT GIFT: This toy is a favorite for all ages It’s colorful design and unique stress relief make it the perfect party favor, stocking stuffer, or relaxation gift for anyone ages 3 and up.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CD92BP3D |
| Age Range Description | Kid |
| Best Sellers Rank | #27,078 in Toys & Games ( See Top 100 in Toys & Games ) #1,542 in Squeeze Toys |
| Brand Name | Sunny Days Entertainment |
| Color | Multi |
| Customer Reviews | 4.4 out of 5 stars 937 Reviews |
| Educational Objective | Concentration, Dexterity |
| Global Trade Identification Number | 00810009208099 |
| Included Components | 1 Expandable Ball |
| Item Dimensions | 5 x 4.99 x 5 inches |
| Item Highlight | 5.5-10 in Diameter, Plastic Construction, Rainbow Geometric Design, Concentration And Dexterity, Manual Hand Powered |
| Item Type Name | Nucleus Expandable Ball – Breathing Toy Sphere for Kids & Adults – Expands from 5.5’’ to 10’’ |
| Item Weight | 1.6 ounces |
| Manufacturer | Sunny Days Entertainment, LLC. |
| Manufacturer Part Number | 320809 |
| Manufacturer recommended age | 36 months - 12 years |
| Material Type | Plastic |
| Model Number | 320809 |
| Number of Packs | 1 |
| Number of Players | 1 |
| Operation Mode | Manual |
| Power Source | Hand-powered |
| Set Name | Single Item |
| Size | Large |
| Sub Brand | Giggle Zone |
| Supported Battery Types | No batteries required |
| UPC | 810009208099 810009208334 |
| Unit Count | 1 Count |

## Images

![Sunny Days Entertainment Nucleus Expandable Ball - Breathing Toy - Ages 3+ - Image 1](https://m.media-amazon.com/images/I/81HkeMH5hhL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Endless Fun in Every Expand 🌈
*by B***E on December 6, 2025*

This expandable ball has been a favorite in our home for years, and it truly stands the test of time. It’s colorful, beautiful, and instantly grabs attention the moment kids see it. Multiple children of different ages have played with it over the years, and it still holds up amazingly well—proof of its outstanding quality. What I love most is that you can’t get bored with it. There are endless ways to play and create fun, imaginative games, and it somehow manages to entertain everyone—including adults. It’s perfect for multiple age groups, making it a go-to toy for playdates, family gatherings, and everyday fun. The durability and design make it well worth it, and it’s easily one of those toys that never gets put away because it’s always being used. You also don’t have to put it together, so who doesn’t love that!

### ⭐⭐⭐⭐⭐ Works Perfectly
*by M***A on March 27, 2026*

I keep this in my office in a school. Kids love to play with it. We use it to teach deep breathing. It has held up for over a year. Excellent value. Easy to use.

### ⭐⭐⭐⭐⭐ Fun That Grows!
*by K***L on April 21, 2025*

This expandable ball is a clever and engaging toy! Its ability to change size keeps things interesting, and the bright colors are visually appealing. For a toy that offers such versatile fun and seems quite durable, it's definitely worth the price. ALSO it is super easy to clean and is great for all ages!

## Frequently Bought Together

- Sunny Days Entertainment Expandable Ball – Breathing Toy Sphere for Kids & Adults – Expands from 6.5’’ to 13"
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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-09*