Pluto is not a planet because it does not dominate its orbit and a planet, according to the IAU is 'a round object orbiting the Sun that is large enough to have either captured nearby debris as satellites or expelled the debris to other orbits.
Pluto is sometimes closer to the Sun than Neptune (this last happened from 1979 to 1999)O
Russia has a larger surface area than Pluto.
Pluto was named based on a proposal by an 11-year-old girl (she chose the name for the Roman god of the Underworld.)
Pluto is so far out that it takes 248 years for it to orbit the sun once
Pluto is small --- if Earth were the size of a golf ball, it would be the size of a very small marble
Pluto's orbit around the sun takes 248 Earth-years
Pluto is smaller than the United States.