Take the RIGHT hand of an older person with your right hand, say "Mano Po" and gently bring that person's right hand towards your own forehead. You may have to bow a bit so that the older person won't have to stretch his arm out too much.
(If you want to hear what Mano Po sounds like, click on the PLAY button below)
If you don't have Flash and can't see the PLAY button above: mano-po.mp3
The older person will sometimes wave his hand as he makes the sign of the cross. It's like he (or she) is giving you his blessing.
Some parents will tell their young kids: "Bless ka kay Lolo" or "Bless, Bless..."