---
product_id: 4148436
title: "Toysmith, Green Science Salt Water Powered Robot Kit, STEAM Powered Kids, Beach Toy, For Boys & Girls 5+"
brand: "4m"
price: "$U1660"
currency: UYU
in_stock: true
reviews_count: 13
category: "4 M"
url: https://www.desertcart.uy/products/4148436-toysmith-green-science-salt-water-powered-robot-kit-steam-powered
store_origin: UY
region: Uruguay
---

# Salt water chemical power Eco-friendly, non-toxic materials Complete DIY assembly kit Toysmith, Green Science Salt Water Powered Robot Kit, STEAM Powered Kids, Beach Toy, For Boys & Girls 5+

**Brand:** 4m
**Price:** $U1660
**Availability:** ✅ In Stock

## Summary

> 🤖 Power up playtime with green energy innovation!

## Quick Answers

- **What is this?** Toysmith, Green Science Salt Water Powered Robot Kit, STEAM Powered Kids, Beach Toy, For Boys & Girls 5+ by 4m
- **How much does it cost?** $U1660 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/4148436-toysmith-green-science-salt-water-powered-robot-kit-steam-powered)

## Best For

- 4m enthusiasts

## Why This Product

- Trusted 4m brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect STEM Starter:** Designed for kids 5+, it’s the ideal introduction to alternative energy and robotics.
- • **All-in-One DIY Kit 🔧:** Everything included for hands-on building fun that sparks STEM curiosity.
- • **Safe & Sustainable 🌱:** Non-toxic, eco-conscious materials teach green science principles effortlessly.
- • **Harness Clean Energy ⚡:** Experience the future with salt water-powered robotics—no batteries needed!
- • **Award-Winning Educational Fun:** Join thousands of young innovators exploring science through play.

## Overview

The 4M Toysmith Salt Water Powered Robot Kit is a compact, eco-friendly STEM toy that uses a safe chemical reaction between salt water and charcoal to power a small robot. Designed for children aged 5 and up, it includes all parts and detailed instructions for easy assembly, promoting hands-on learning about alternative energy and sustainability.

## Description

Product Description Create a robotic racer using the 4M Salt Water Powered Robot Kit. This robot kit is a hands-on learning experience that illustrates the value of alternate energy sources. The robot is powered by the chemical reaction of salt water and charcoal, and is safe and non-toxic. This kit contains all the parts and materials needed to create a salt-water powered robot. Detailed assembly instructions included. Recommended for ages 8 years and up. From the Manufacturer Build your own racer with our 4M Salt Water Power Robot Kit. Powered by using charcoal and salt water. Detailed instructions included. Award winning Green Science introduces kids to green concepts such as repurposing, upcycling and alternative energy.

Review: More Fun Than Anticipated - Super fun and easy! Great value for my money. Perfect activity for age range. Kids felt awesome after installation.
Review: Works well but smaller scale - We have tested this product with both the suggested dirty water and water colored with food coloring and it worked on both cases. It should be noted however that the filtering materials are vert small quantities, so using a big amount of water dirt or colors will make it less efficient faster. I would suggest to do the test with small amounts, I think 50 ml is more the enough to demonstrate the principle. For the dyed water I ended up using only 20 ml. My daughter used it for her science project and it was very fun for her to do and she assemble it herself with my guidance to explain the instructions. She is first grade so I do not think it is very challenging bu fun and educating to observe. I added a video of the assembly and the final product and function. I would suggest to use a heavy glass container as a collector as they suggested because it was too flimsy when my daughter used a plastic cup and needed to add a support cup as seen in the end of the video.

## Features

- This robot kit is a hands-on learning experience that illustrates the value of alternate energy sources
- The robot is powered by the chemical reaction of salt water and charcoal, and is safe and non-toxic
- This kit contains all the parts and materials needed to create a salt-water powered robot
- Detailed assembly instructions included
- Recommended for ages 8 years and up

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00AV8XBGG |
| Best Sellers Rank | #21,273 in Toys & Games ( See Top 100 in Toys & Games ) #214 in Educational Science Kits |
| Customer Reviews | 4.3 4.3 out of 5 stars (3,862) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.2 ounces |
| Item model number | 3688 |
| Manufacturer | Toysmith |
| Manufacturer recommended age | 5 years and up |
| Product Dimensions | 2.5 x 6.5 x 8.5 inches |
| Release date | December 11, 2018 |

## Images

![Toysmith, Green Science Salt Water Powered Robot Kit, STEAM Powered Kids, Beach Toy, For Boys & Girls 5+ - Image 1](https://m.media-amazon.com/images/I/71mNtK-NRZL.jpg)

## Questions & Answers

**Q: What kind of functions develop this robot? What does it do?**
A: It goes forward.  That is it.   It took my son and I about 10 minutes to build it, and it ran for about 30 minutes before the battery need to be cleaned, and rebuilt.

**Q: How many watts is the LED lightbulb?**
A: The power depends how fast you spin the windmill.The forward voltage drop of an LED is typically 2 to 3 V. Let's say 2.5V.A current of 20 mA (0.02A) will produce a bright light. That's probably close to what you get with a fairly strong wind turning your windmill.The power dissipated in the LED in this case is 2.5 x 0.02 = 0.05W = 50 mW.

**Q: Is included the elements, for example charcoal, aluminium or salt? And is included some pieces of science kit as tube, ect?**
A: It a simple kit,  included small slides aluminum, carbon, works fine but is small,  from kids 4 old years. Needs salt and water not included in the box.

**Q: Does this only work once? My son can't get it to go a second time. Wondering what to do.**
A: It will work multiple times. Make sure after each use to clean the battery parts with water and allow to dry before reassembling

## Customer Reviews

### ⭐⭐⭐⭐⭐ More Fun Than Anticipated
*by S***M on July 22, 2025*

Super fun and easy! Great value for my money. Perfect activity for age range. Kids felt awesome after installation.

### ⭐⭐⭐⭐⭐ Works well but smaller scale
*by H***H on March 17, 2019*

We have tested this product with both the suggested dirty water and water colored with food coloring and it worked on both cases. It should be noted however that the filtering materials are vert small quantities, so using a big amount of water dirt or colors will make it less efficient faster. I would suggest to do the test with small amounts, I think 50 ml is more the enough to demonstrate the principle. For the dyed water I ended up using only 20 ml. My daughter used it for her science project and it was very fun for her to do and she assemble it herself with my guidance to explain the instructions. She is first grade so I do not think it is very challenging bu fun and educating to observe. I added a video of the assembly and the final product and function. I would suggest to use a heavy glass container as a collector as they suggested because it was too flimsy when my daughter used a plastic cup and needed to add a support cup as seen in the end of the video.

### ⭐⭐⭐⭐ 2 things to watch out for during assembly to make it work great!
*by H***R on January 22, 2018*

I received this today in our RND Lab and assembled it right away. Had 2 issues that once corrected, the unit works just fine. 1st, they provide a detailed instruction sheet and it is simple to follow. They "clearly" show the RED wire at the bottom right rear and the BLACK on the other terminal. After assembly the light would not light up. As an engineer, I immediately started trouble shooting and found that if it was spun backwards the LED would light up. Of course being thorough (they recommend twisting the wires which I just can't live with), had to "de-solder" and then re solder the wires to the opposite terminals. Using our shop air compressor system and 40 PSI the LED lit very brightly. 2nd, the bottle cap adapter that they recommend adding oil to is molded with too high of a tolerance. To fix this problem, I sanded the very top edge until it was smooth (there is a very definite ridge ring that can be felt around it that is unnecessary). After that it easily spun around as it should. I've added a picture showing the 2 steps above. So, in the end, definitely an excellent product for learning and and the price is very reasonable. If it hadn't been for the extra work it would have been given it all 5 stars.

## Frequently Bought Together

- 4M Toysmith, Green Science Salt Water Powered Robot Kit, STEAM Powered Kids, Beach Toy, For Boys & Girls 5+
- 4M Green Science Solar Rover, DIY STEAM Powered Kids Science Kit, Boys & Girls Ages 5+

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-04*