---
product_id: 377881146
title: "Ada Twist, Scientist Light and Reveal Pen with Invisible Ink, Lights Up and Plays The The Hypothesis Song, Accessory for Scientist Dress-Up Set, Kids Toys for Ages 3 Up by Just Play"
brand: "just play"
price: "€ 34.76"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.hr/products/377881146-ada-twist-scientist-light-and-reveal-pen-with-invisible-ink
store_origin: HR
region: Croatia
---

# Plays Music Invisible Ink Lights Up Ada Twist, Scientist Light and Reveal Pen with Invisible Ink, Lights Up and Plays The The Hypothesis Song, Accessory for Scientist Dress-Up Set, Kids Toys for Ages 3 Up by Just Play

**Brand:** just play
**Price:** € 34.76
**Availability:** ✅ In Stock

## Summary

> 🔍 Unleash the Scientist Within!

## Quick Answers

- **What is this?** Ada Twist, Scientist Light and Reveal Pen with Invisible Ink, Lights Up and Plays The The Hypothesis Song, Accessory for Scientist Dress-Up Set, Kids Toys for Ages 3 Up by Just Play by just play
- **How much does it cost?** € 34.76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/377881146-ada-twist-scientist-light-and-reveal-pen-with-invisible-ink)

## Best For

- just play enthusiasts

## Why This Product

- Trusted just play brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready to Play:** Includes batteries, so the fun starts right out of the box!
- • **Dress-Up Delight:** Perfect accessory for the Ada Twist, Scientist Dress-Up Set—because every scientist needs their tools!
- • **Sing Along Science:** Press the button to hear Ada's catchy 'Hypothesis Song' and inspire young minds!
- • **Interactive Learning:** Encourages exploration of friendship, discovery, and teamwork through play!
- • **Illuminate Imagination:** Light up your child's creativity with a pen that reveals hidden messages!

## Overview

The Ada Twist, Scientist Light and Reveal Pen is an interactive toy designed for children ages 3 and up. It features lights, music, and invisible ink, allowing kids to write secret messages and reveal them with a light. This pen is a perfect accessory for the Ada Twist, Scientist Dress-Up Set and promotes imaginative play and scientific curiosity.

## Description

Ada Twist, Scientist Light and Reveal Pen with Invisible Ink, Lights Up and Plays The The Hypothesis Song, Accessory for Scientist Dress-Up Set, Kids Toys for Ages 3 Up by Just Play

## Features

- This Ada Twist, Scientist pen features lights, phrases, music and includes a notepad. Press the pen's button to hear Ada sing "The Hypothesis Song"!
- Write a message on the notepad with the invisible ink pen and shine the light to reveal the hidden message.
- Looks just like the one Ada uses on Netflix’s preschool show and makes a great accessory for the Ada Twist, Scientist Dress-Up Set.
- Bring home the the rest of the Ada Twist, Scientist toys and let your child explore the fun of friendship, scientific discovery, and teamwork.
- Requires 3 x AG13 batteries (included).
- Ages 3+

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Sheet Count | 3 |
| Color | Multi-color |

## Product Details

- **Color:** Multi-color
- **Sheet Size:** Letter
- **Brand:** Just Play
- **Sheet Count:** 3
- **Manufacturer:** Just Play

## Images

![Ada Twist, Scientist Light and Reveal Pen with Invisible Ink, Lights Up and Plays The The Hypothesis Song, Accessory for Scientist Dress-Up Set, Kids Toys for Ages 3 Up by Just Play - Image 1](https://m.media-amazon.com/images/I/51pVD6+ABxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ We love Ada!!
*by L***N on November 11, 2023*

Perfect easy inexpensive gift to keep our girl busy. Imagination just flows.

### ⭐⭐⭐⭐⭐ Awesome!
*by T***M on June 5, 2023*

I bought 2. One for me and one for my granddaughter so we can send invisible messages to each other. The song it plays is a little annoying after a while.

### ⭐⭐⭐⭐⭐ Fun
*by A***R on December 27, 2023*

Daughter loves just what she asked for .

## Frequently Bought Together

- Ada Twist, Scientist Light and Reveal Pen with Invisible Ink, Lights Up and Plays The The Hypothesis Song, Accessory for Scientist Dress-Up Set, Kids Toys for Ages 3 Up by Just Play
- Just Play Ada Twist, Scientist Glow and Go Notebook, Lights Up and Plays the ''The Why Song'', Includes Experiment Card, Kids Toys for Ages 3 Up
- Just Play Ada Twist, Scientist Ada Twist Lab Doll, 12.5 Inch Interactive Doll with Research Lab Accessories, Talks and Sings the ''The Brainstorm Song'', Kids Toys for Ages 3 Up

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**Shop now:** [https://www.desertcart.hr/products/377881146-ada-twist-scientist-light-and-reveal-pen-with-invisible-ink](https://www.desertcart.hr/products/377881146-ada-twist-scientist-light-and-reveal-pen-with-invisible-ink)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-18*