Smithsonian Perpetual Motion Machine bus The lovable Horton the Elephant

The lovable Horton the Elephant is now available in adorable plush form

She also features a fluffy

5" length by 11" height and 4

Bring Mothman wherever you go with this keychain

Smithsonian Perpetual Motion Machine bus The lovable Horton the ElephantBuild 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 didn't work. Learn about magnets and the First and Second Laws of Thermodynamics. Understand how batteries create the magnetic force to keep the machine