Saltwater Fuel Cell Robot writes This is a great gift

This is a great gift for boys and girls celebrating birthdays

which features a simple unicorn design in calming colors

sculpted character movers

a magic wand

Saltwater Fuel Cell Robot writes This is a great giftBuild a sleek, modern (and adorable!) walking robot powered by salt water and magnesium no batteries required! Discover how a metal air electrochemical cell stores and discharges electrical energy using a simple saltwater solution. Explore the science of electricity, currents, and electric potential. An innovative pump mechanism provides a steady drip of salt water onto the magnesium plates and the robot walks for up to one hour on just one drop of