How does one do "the Sign of the Cross"?

[Didacus]

Alright, at supper last night we got started in an argument about signing the cross before the supper prayer.

Now, which is it one or the other or both;


In the name of the Father (touch your forehead)
the Son (touch your right shoulder)
the Holy Spirit (touch your left shoulder)
Amen (fold hands in middle)


or

In the name of the Father (touch the forehead)
The son (touch the belly)
The Holy Spirit (touch both shoulders)
Amen (fold hands in the middle0


Even my three year old agreed about the Father => touch the forehead part.

Thank you in advance for your time.

didace

[cappie]

Touch the forehead as you say (or pray mentally) "In nomine Patris" ("In the name of the Father")

touch the breastbone or top of the belly as you say "et Filii" ("and of the Son")

touch the left shoulder, then right shoulder, as you say "et Spiritus Sancti" ("and of the Holy Spirit").

An optional prayer to pray after signing yourself in the Name of the Father, Son, and Holy Ghost is this one, said to be favored by St. Benedict:

By the Sign of the Cross, deliver me from my enemies, O Lord.

Note that Eastern Catholics (and Orthodox) go from right shoulder to left and end sometimes by touching their right side, above the hip, to symbolize Christ's being pierced by the sword.