I Was A Sixth Grade Alien!
Written by Bruce Coville
from the back cover
The Aliens have finally made contact! But when the first Ambassador from another planet arrives, he insists that his son, Pleskit Meenom, be treated like any other citizen on Earth. Which is why Pleskit Meenom has become the first purple kid in Ms. Weintraub's sixth grade class. For Tim Tompkins, who has waited his entire life to meet an alien, this is like a dream come true. but when Pleskit invites Tim back to the embassy and they stumble across a plan to sabatoge the alien mission, Tim's dream becomes a life-threatening nightmare!