---
product_id: 512082671
title: "Spy Labs Inc: Secret Message Tools Exchange Confidential Info w/Secret Pens | Essential Tools & Tricks of The Trade from The Detective Gear Experts for Young Investigators Medium"
brand: "thames & kosmos"
price: "€ 13.32"
currency: EUR
in_stock: true
reviews_count: 9
category: "Thames & Kosmos"
url: https://www.desertcart.pt/products/512082671-spy-labs-inc-secret-message-tools-exchange-confidential-info-w
store_origin: PT
region: Portugal
---

# compact 4.3 x 1.2 x 2.9 inch size includes brush & petri dish for experiments 2 secret invisible ink pens Spy Labs Inc: Secret Message Tools Exchange Confidential Info w/Secret Pens | Essential Tools & Tricks of The Trade from The Detective Gear Experts for Young Investigators Medium

**Brand:** thames & kosmos
**Price:** € 13.32
**Availability:** ✅ In Stock

## Summary

> 🕵️‍♂️ Unlock the secrets only true agents can see!

## Quick Answers

- **What is this?** Spy Labs Inc: Secret Message Tools Exchange Confidential Info w/Secret Pens | Essential Tools & Tricks of The Trade from The Detective Gear Experts for Young Investigators Medium by thames & kosmos
- **How much does it cost?** € 13.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/512082671-spy-labs-inc-secret-message-tools-exchange-confidential-info-w)

## 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

- • **Compact & Portable:** Medium-sized kit fits perfectly in your backpack for on-the-go covert ops and mystery solving.
- • **Hands-On Spy Science:** Engage in real forensic-style experiments using included brush and petri dish for authentic detective play.
- • **Trusted Detective Gear:** From Thames & Kosmos, the experts in educational spy tools that blend fun with learning.
- • **Invisible Ink Messaging:** Send and reveal secret notes with exclusive dual-ink pens—only your partner decodes the message.
- • **Perfect for Young Sleuths:** Designed for kids 8+, it sparks curiosity and critical thinking through immersive spy role-play.

## Overview

Thames & Kosmos Spy Labs Inc Secret Message Tools is a medium-sized, educational spy kit featuring two unique invisible ink pens that allow kids 8+ to write and reveal confidential messages. The set includes a brush and petri dish for hands-on forensic experiments, promoting interactive detective play. Compact and manual-powered, it’s a trusted tool from the detective gear experts designed to inspire young investigators with real spy techniques.

## Description

As a detective, you need the right equipment for your investigations, including tools for writing and uncovering secret messages. Exchange confidential messages with your fellow agent using disappearing and reappearing ink that only the two of you can read! Using either of the two secret pens, you can write a message that, once dry, becomes invisible. The other pen will not only reveal the information, but you can also use it to send your reply. From Spy Labs, the Detective Gear Experts!

Review: Fun - Bought this as a gift .they seemed to enjoy it!
Review: Pretty disappointing - This kept my 8 year old occupied for about 10 minutes. I'm sure he'll come back to it at some point, but the kit is small and not that great. It contains two pens, a small dish and a little brush: The dish and the brush are for an experiment to smear lemon juice or milk on a piece of paper, allow it to disappear and then develop it by heating the paper to 200 degrees for 5 minutes (with supervision!) One of the pens writes in invisible ink. The other pen enables it to be developed. That's it! There are other sets out there with little UV lights or bigger, better pens. The only thing this has going for it is that it's cheap and compact. Like all toys from this maker, the instructions are engaging and pretty good, hence 3 stars and not just 1.

## Features

- Spy Labs Incorporated's activity kits and equipment provide an engaging and interactive way for kids to learn about detective work, including forensic analysis and tracking techniques.
- Includes two unique pens that allow you and your fellow agents to exchange secret, confidential messages.
- The pens use a special ink that becomes invisible once dry; write a secret message with one pen and rest assured: only the other pen can be used to reveal what you wrote!
- Promotes pretend play as kids ages 8 and up take on the role of detective, setting out to unravel mysteries one tough case at a time.
- Become a first-class secret agent with Spy Labs, the Detective Gear Experts; your trusted source for all your essential spy tools and gear!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BS4GZS3S |
| Age Range Description | Kid |
| Best Sellers Rank | #92,389 in Toys & Games ( See Top 100 in Toys & Games ) #47 in Toy Electronic Spy Gear |
| Brand Name | Thames & Kosmos |
| Color | Red |
| Customer Reviews | 4.0 4.0 out of 5 stars (68) |
| Educational Objective | Reading |
| Global Trade Identification Number | 10814743017723 |
| Included Components | 2 secret pens, brush, petri dish, and notepad, manual |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required | No |
| Item Dimensions | 4.3 x 1.2 x 2.9 inches |
| Item Type Name | Toy Detective Gear |
| Manufacturer | Thames & Kosmos |
| Manufacturer Maximum Age (MONTHS) | 360.0 |
| Manufacturer Minimum Age (MONTHS) | 96.0 |
| Manufacturer Part Number | 548013 |
| Material Type | Plastic |
| Model Number | 548013 |
| Number of Players | 1 |
| Operation Mode | Manual |
| Power Source | Manual |
| Set Name | Secret Message Tools |
| Size | Medium, Small |
| Supported Battery Types | Not required |
| Theme | Detective, Spying |
| UPC | 814743017726 |

## Images

![Spy Labs Inc: Secret Message Tools Exchange Confidential Info w/Secret Pens | Essential Tools & Tricks of The Trade from The Detective Gear Experts for Young Investigators Medium - Image 1](https://m.media-amazon.com/images/I/81OcTSItcEL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fun
*by M***T on March 16, 2026*

Bought this as a gift .they seemed to enjoy it!

### ⭐⭐⭐ Pretty disappointing
*by A***T on August 1, 2024*

This kept my 8 year old occupied for about 10 minutes. I'm sure he'll come back to it at some point, but the kit is small and not that great. It contains two pens, a small dish and a little brush: The dish and the brush are for an experiment to smear lemon juice or milk on a piece of paper, allow it to disappear and then develop it by heating the paper to 200 degrees for 5 minutes (with supervision!) One of the pens writes in invisible ink. The other pen enables it to be developed. That's it! There are other sets out there with little UV lights or bigger, better pens. The only thing this has going for it is that it's cheap and compact. Like all toys from this maker, the instructions are engaging and pretty good, hence 3 stars and not just 1.

### ⭐⭐⭐⭐ simple but fun
*by R***E on September 20, 2024*

This review is for the Thames & Kosmos Spy Labs Inc: Secret Message Tools Exchange Confidential Info w/Secret Pens. The metal storage tin is cute and useful. The kit consists of a small notepad, a petri dish, 2 pens, 1 brush, and a small info insert. The first secret message method is using the magic pens. The second method is to use household items like milk or juice from lemon, apple, or onion and then to reveal the dried message using heat from a 400 degree oven. This kit is small but fun. My kids have used invisible ink UV spy pens in the past and had fun. I think that they’ll like adding a few new methods for writing secret messages.

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-04-24*