Neptune
is blue because of the methane in the atmosphere.
has winds at 1500 mph (the highest on Earth are at 150 mph)
can hold 60 Earths
has seasons that last about 40 Earth years. When the south pole is in summer, it is in constant daylight for 40 years.
takes 165 Earth years to rotate aroud the Sun. As it was discovered in 1846, it has not yet made a complete orbit while we've known it exists.
has 8 moons. It's largest moon, Triton, has the coldest surface of any body in the solar system: -235 C.
Triton rotates the opposite way it orbits, and is gradually getting closer to Neptune. In about 10 to 100 million years, the two bodies will collide, leaving Neptune with more rings than Saturn.
Every 248 Earth years Neptune becomes the furthest planet from the Sun for 20 years.