⚡️Black Friday deals are live! View Deals
Search  for anything...
4M

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

  • Based on 3,809 reviews
Condition: New
Checking for the best price...
$15.62 Why this price?
Black Friday Deal · 59% off was $37.99

Buy Now, Pay Later

As low as $3 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Dec 2
Order within 17 hours and 21 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Style: Salt Water Powered Robot Kit


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

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.

Product Dimensions: 2.5 x 6.5 x 8.5 inches


Item Weight: 4.2 ounces


Item model number: 3688


Manufacturer recommended age: 5 years and up


Is Discontinued By Manufacturer: No


Release date: December 11, 2018


Manufacturer: Toysmith


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Dec 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • More Fun Than Anticipated
Style: Windmill Generator Kit
Super fun and easy! Great value for my money. Perfect activity for age range. Kids felt awesome after installation.
Reviewed in the United States on July 22, 2025 by Shreem
    • Worked well
Style: Wind Turbine Science Kit
Arrived when expected. Easy to assemble. Worked as described. Reasonable price.
Reviewed in the United States on May 4, 2025 by Customer
    • 2 things to watch out for during assembly to make it work great!
Style: Windmill Generator Kit
Review Image by Hew-Product Design Engineer Hew-Product Design Engineer
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. ... show more
Reviewed in the United States on January 22, 2018 by Hew-Product Design Engineer Hew-Product Design Engineer
    • Works well but smaller scale
Style: Clean Water Science
Review Image by Hualgh Hualgh
The media could not be loaded. 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. ... show more
Reviewed in the United States on March 17, 2019 by Hualgh Hualgh
    • Not so great
Style: Salt Water Powered Robot Kit
The part that the salt water goes on pops out and it has to be held in place to work. Not very good for engaging a kid in the use of the experiment
Reviewed in the United States on February 26, 2025 by Jim
    • Best Present Ever!
Style: Salt Water Powered Robot Kit
Ever see a kid get a present and FREAK? Then he doesn't put it down at all - he walks around with the present in his hand throughout the whole party - gripped in his hand - just because he loves the present sooo much? That is what I experienced when I gave this present to my nephew on Christmas Eve. The kid didn't put the box down. He thought it was the best thing, he passed over the video games and zeroed in on this present and it was the best present in the world. I gave 4M presents to all the kids and it was a hit. Getting feedback from Dad on later install - he said it was fun to put together, easy for the 9 year old boy to figure out, but challenging enough for fun - and it was SUPER FAST when the water was added. Works for me. ... show more
Reviewed in the United States on December 28, 2014 by Parajunkee
    • My son loves this!
Style: Wind Turbine Science Kit
Easy to assemble, directions were clear. Good construction. My 6 year old was able to follow with my assistance the assembly. I will be purchasing another so we can have two. I ended up filling the 2 liter bottle with concrete to give more stability.
Reviewed in the United States on May 30, 2024 by KS07
    • Science Project Done!
Style: Windmill Generator Kit
This was a lifesaver for an overdue science project my Son needed to get done for his 4th grade class. The instructions were easy to follow, the science was clear to understand and explain in his report, and he and his Dad had fun building it and testing it out. It worked just as promised and the light is clear to see. It got here fast and was very afforable... just an all around great product! Thank you! ... show more
Reviewed in the United States on January 5, 2023 by Dani True

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...