---
product_id: 315857575
title: "Thames & Kosmos Gross Science STEM Experiment Kit | Mix Up 3 Types of Slime, Great for Pranks! | Explore Scientific Properties of Slime | 3-Language Instruction Manual (English, French, Spanish)"
brand: "thames & kosmos"
price: "$59"
currency: NZD
in_stock: false
reviews_count: 5
url: https://www.desertcart.nz/products/315857575-thames-and-kosmos-gross-science-stem-experiment-kit-mix-up
store_origin: NZ
region: New Zealand
---

# Glow-in-the-dark slime effect 3-language manual 3 unique slime formulas Thames & Kosmos Gross Science STEM Experiment Kit | Mix Up 3 Types of Slime, Great for Pranks! | Explore Scientific Properties of Slime | 3-Language Instruction Manual (English, French, Spanish)

**Brand:** thames & kosmos
**Price:** $59
**Availability:** ❌ Out of Stock

## Summary

> 🧬 Get your hands messy and your mind glowing with slime science!

## Quick Answers

- **What is this?** Thames & Kosmos Gross Science STEM Experiment Kit | Mix Up 3 Types of Slime, Great for Pranks! | Explore Scientific Properties of Slime | 3-Language Instruction Manual (English, French, Spanish) by thames & kosmos
- **How much does it cost?** $59 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/315857575-thames-and-kosmos-gross-science-stem-experiment-kit-mix-up)

## Best For

- thames & kosmos enthusiasts

## Why This Product

- Trusted thames & kosmos brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Science Meets Play:** Explore slime’s weird properties while mastering basic chemistry concepts
- • **Glow & Gross Pranks:** Create glowing 'radioactive' spills and hilarious fake snot to wow your friends
- • **Multilingual Mastery:** Instructions in English, French & Spanish for global STEM explorers
- • **Perfect for Social Fun:** Ideal for April Fools’ pranks and bonding over quirky experiments
- • **Triple Slime Chemistry:** Mix 3 safe, non-toxic slime types for endless hands-on fun

## Overview

The Thames & Kosmos Gross Science STEM Experiment Kit lets kids aged 8-12 mix three types of safe, non-toxic slime, including a glow-in-the-dark variety, while learning scientific principles. Featuring a 3-language manual (English, French, Spanish), this kit combines playful pranks with educational exploration, making it a top choice for young science enthusiasts eager to impress friends and family.

## Description

Mix up three different types of safe, non-toxic slime and play funny pranks with them. Make fake snot, a glowing “radioactive” spill, and trick doggy doo. Explore the weird and wacky properties of slime that makes it so gross and so much fun at the same time! Mix up yucky substances, play pranks with them, and explore their properties.

Review: Kid gave 5 stars - My nephew loved it. He thought it was perfect and easy to use.
Review: Omg don't get this - Omg don't get this. None of the slimes worked for us and it made my kid cry since it was part of his birthday present. He loves science and this was total BS. Just powder and water with the wrong ratios that made nothing. Very disappointing

## Features

- Mix up three different types of safe, non-toxic slime!
- Play fun pranks with your slime, like making fake snot, a glowing "radioactive" spill, and trick doggy doo.
- Explore the properties of slime and learn about radioactivity.
- Great ideas for April Fools' pranks!
- Three-language packaging and manuals (English, French, Spanish)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08TVX9PM2 |
| Best Sellers Rank | #650,610 in Toys & Games ( See Top 100 in Toys & Games ) #5,793 in Educational Science Kits |
| Customer Reviews | 4.2 4.2 out of 5 stars (15) |
| Item Weight | 5.6 ounces |
| Item model number | 551106 |
| Manufacturer | Thames & Kosmos |
| Manufacturer recommended age | 8 - 12 years |
| Product Dimensions | 7.4 x 2.3 x 8.8 inches |
| Release date | May 14, 2021 |

## Images

![Thames & Kosmos Gross Science STEM Experiment Kit | Mix Up 3 Types of Slime, Great for Pranks! | Explore Scientific Properties of Slime | 3-Language Instruction Manual (English, French, Spanish) - Image 1](https://m.media-amazon.com/images/I/819ddRKWQsL.jpg)
![Thames & Kosmos Gross Science STEM Experiment Kit | Mix Up 3 Types of Slime, Great for Pranks! | Explore Scientific Properties of Slime | 3-Language Instruction Manual (English, French, Spanish) - Image 2](https://m.media-amazon.com/images/I/81okgSvfQIL.jpg)
![Thames & Kosmos Gross Science STEM Experiment Kit | Mix Up 3 Types of Slime, Great for Pranks! | Explore Scientific Properties of Slime | 3-Language Instruction Manual (English, French, Spanish) - Image 3](https://m.media-amazon.com/images/I/71JmeXFxdzL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Kid gave 5 stars
*by A***N on July 16, 2025*

My nephew loved it. He thought it was perfect and easy to use.

### ⭐ Omg don't get this
*by T***A on November 4, 2022*

Omg don't get this. None of the slimes worked for us and it made my kid cry since it was part of his birthday present. He loves science and this was total BS. Just powder and water with the wrong ratios that made nothing. Very disappointing

### ⭐ Don't buy this!
*by L***N on April 3, 2023*

The slimes don't work. They stay liquid and never activate. Made my 7 year old cry.

## Frequently Bought Together

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-04*