We then took a walk around the neighborhood and collected trash on the streets. We connected how this trash could easily get in the sewers or nearby river (which leads into the Mississippi River--->and then into ---> the Gulf of Mexico.
I think this has to be my favorite line of the Girl Scout Law!
The thing about this petal is that there are thousands of ways one can do this!
I would definitely leave it up to the girls on this one. Ask them what it means to make the world a better place and have them come up with ideas they can do as a troop. If they are having trouble coming up with their own make some suggestions or give them starter ideas. When girls talk about and feel a connection with the cause it's much more meaningful to them and they will gain more out of the experience than just picking something for them.