The Star of David is a six-pointed star made up of two triangles superimposed over each other. The origins it are unclear, there are many ideas about the symbolic meaning. Some Kabbalists thought that the six points represented God's absolute rule over the universe in all six directions: north, south, east, west, up and down. They also believed that the triangles represented humanity's dual nature - good and evil - and that the star could be used as protection against evil spirits. We do know that the symbol hasn't always been associated exclusively with Judaism, but was used by Christians and Muslims at various points in history. Sometimes it was even associated with King Solomon instead of King David.
L'chai, L'chaim: is Hebrew for "To Life."
The Hamsa (or Hand of Fatima) is an ancient Middle Eastern amulet symbolizing the Hand of God. In all faiths it is a protective sign. It brings it's owner happiness, luck, health, and good fortune.
Shalom is understood around the world to mean "peace." However, "peace" is only one small part of the meaning. "Shalom" is used to both greet people and to bid them farewell, and it means much more than "peace, hello or goodbye"...