Smithsonian Perpetual Motion Machine Books Hand-wash only to preserve the

Hand-wash only to preserve the intricate design

Celebrates one of North America's most recognizable native moths

This immersive science kit combines reading

Featuring delightful

curiosity-driven design

Smithsonian Perpetual Motion Machine Books Hand-wash only to preserve theBuild a Perpetual Motion Machine powered by an invisible magnetic field! Ever wonder why scientists, engineers, and mathematicians have never been able to create such a machine without an external energy source like batteries? Explore different kinds of motion machines and understand why they didnt work. Learn about magnets and the First and Second Laws of Thermodynamics. Understand how batteries create the magnetic force to keep the machine