Kids ages 8 & up assemble a walking robot that’s powered by salt water and magnesium alone—no batteries required!

When salt water is added to the magnesium fuel cell, it creates a chemical reaction that produces a flow of electricity to power the robot.

An innovative pump mechanism provides a steady drip of salt water onto the magnesium plates; the robot walks up to 1 hour on just one drop of salt water!

The “fuel” (i.e. salt water) tank is easy to clean, refill, and reuse for hours of exploration, and the kit includes three magnesium plates, each with an operating time of about four hours.

The 28-page, full-color manual guides assembly and experimentation and explores the science behind and benefits of non-toxic, long-lasting, alternative energy sources.