"The Filipino tradition of pagmamano involves kissing an elder's hand or raising the hand to touch your forehead. Children do this especially during holidays when visiting grandparents to ask for gifts." (from http://tagaloglang.com)
For our family, this is how we greet our elders. Rafa, our first born, has been doing it for quite some time now. Just recently, Lucas learned it! We hope to capture it on video soon. He is doing it quite consistently and we are so thrilled.