Passed on for many generations are Girl Scout traditions.
Ceremonies are an integral part of Girl Scouts and are used to mark special events and celebrations. Flag ceremonies, bridging ceremonies, and award ceremonies are celebrated often. More detail can be found at http://www.girlscouts.org/program/gs_central/ceremonies/
A Girl Scout swap is a small momento shared between 2 girls that meet at an event. When attending a state or national encampment, it has been tradition to bring a supply of swaps to distribute to new friends you have made. Read more and see examples: Swaps.doc
At troop meetings, around the campfire, or at International jamborees, songs are a long time tradition of scouting. The Internet is a great place to locate the favorites and there are published books and CDs available at Girl Scout shops.