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Sunday's march of more than 5,000 Girls Scouts across the George Washington Bridge is part of an old the tradition. This "bridging" helped kick off a year-long celebration of the Girl Scouts' 100th anniversary.

"It signifies the accomplishments and responsibilities, skills and experiences of one age level, graduating to the next," said CEO Helen Wronski of the Girls Scouts Council of New Jersey. "So 'daisies' graduate to 'brownies,' 'brownies' graduate to 'juniors.'"

It also symbolizes the organization's transition from its first century into its second. The lights on the George Washington Bridge will be lit green, the official color of the Girl Scouts, throughout the month of November.

Scout Zaria Steward said being part of the organization has taught her lessons that she will carry with her throughout her life.

"It means to help others without being asked, to respect the law, be friendly to everyone and just help out," said Steward.

Katie Siefer marched with her mother and grandmother, to represent three generations of Girl Scouts.

Peg Siefer, Katie's mother, said she wanted her daughter to be taught all the same lessons she once learned through the organization.

"Service and helping others, and really getting the message to girls that they can grow up to be strong women," said Peg Siefer.

"We've gone from just being 'girls' to being people, to being as good or better than the Boy Scouts," said Maureen Demes, Katie's grandmother.

The celebration also included plenty of hands-on arts and crafts activities, dancing and live music.

The party does not end there, as activities sponsored by the local Girl Scouts councils will go on until next year.

The Girl Scouts of the USA turns 100 on March 12, and the festivities will be capped off with a concert and fireworks display at Liberty State Park in Jersey City in June.