Celestial
“They are they who received the testimony of Jesus, and believed on his name and were baptized, … that by keeping the commandments they might be washed and cleansed from all their sins, and receive the Holy Spirit.” These are they who overcome the world by their faith. They are just and true so that the Holy Ghost can seal their blessings upon them. (See D&C 76:51–53.) Those who inherit the highest degree of the celestial kingdom, who become gods, must also have been married for eternity in the temple (see D&C 131:1–4). All who inherit the celestial kingdom will live with Heavenly Father and Jesus Christ forever (see D&C 76:62).
Through the work we do in temples, all people who have lived on the earth can have an equal opportunity to receive the fulness of the gospel and the ordinances of salvation so they can inherit a place in the highest degree of celestial glory.
Got to be married to get in. Check.
Terrestrial
These are they who rejected the gospel on earth but afterward received it in the spirit world. These are the honorable people on the earth who were blinded to the gospel of Jesus Christ by the craftiness of men. These are also they who received the gospel and a testimony of Jesus but then were not valiant. They will be visited by Jesus Christ but not by our Heavenly Father. (See D&C 76:73–79.)
Includes all ex-mormons, in actives, etc.
What kind of a Father refuses to see his kids because they didn't behave well enough?
Telestial
These people did not receive the gospel or the testimony of Jesus either on earth or in the spirit world. They will suffer for their own sins in hell until after the Millennium, when they will be resurrected. “These are they who are liars, and sorcerers, and adulterers, and whoremongers, and whosoever loves and makes a lie.” These people are as numerous as the stars in heaven and the sand on the seashore. They will be visited by the Holy Ghost but not by the Father or the Son. (See D&C 76:81–88, 103–6, 109.)
So Dad and Eldest Brother are going to stay away from these children/siblings because they've been really bad. Can you just imagine if you or your parents operated this way?
Also, which muppets, when coming face to face with Jesus are going to say "nah, I don't believe in you, send me to hell for a while"? Just accept Mormon Jesus until after the Millennium and then go inactive! Simples.
http://www.LDS.org/manual/gospel-princi ... t?lang=eng