Read John 14:26 to the children. Emphasize that Jesus Christ sent the Holy Ghost to help and comfort his Apostles. Even though the Apostles could not see the Holy Ghost, they could feel him helping and comforting them. That is why he is called the Comforter.
The Holy Ghost does not have a body of flesh and bones as we do. He has a spirit body in the form of a man.
The Holy Ghost teaches us about Heavenly Father and Jesus Christ and bears witness of those things we are taught about them.
The Holy Ghost bears witness to us when we are taught the truth that what we are hearing is truth.
The Holy Ghost is sent from Heavenly Father and Jesus Christ to help us choose the right.
MT: Constant companionship -- someone who will be with us all of the time.
Moroni 10: 5 And by the power of the Holy Ghost ye may aknow the btruth of all things.
D&C 130:22 TheaFatherhas abbodyof flesh and bones as tangible as man’s; the Son also; but the Holy Ghost has not a body of flesh and bones, but is a personage ofcSpirit. Were it not so, the Holy Ghost could notddwellin us.