To complete the Rosie, Make the World a Better Place, petal, your troop could work on planting a butterfly garden in the community or at a school. Your troop could also hand out butterfly plants to people to encourage them to start a garden.
To complete the Mari, Responsible For What I Say And Do, petal, your troop members could each plant a butterfly plant from seed, or buy a small butterfly plants and water it and take care of it. If everyone had a different plant or multiple plants to take care of and water, you could have them make a garden with the plants they took care of the complete the Rosie, Make the World a Better Place Badge.