I don't know how to edit my reply, so I'm just adding another. Requirements can be done as a group. If the badge is cooking, each girl doesn't have to make a separate batch of brownies, they can do it together. With seven girls, you might want to make two or three pans. If they have to interview someone they don't all have to interview a separate person, you can invite someone to your meeting and they all ask a question. But they do all have to be actively involved, not just listening to a report of what someone else did. For your warm-up activity they could work in pairs or each girl contribute an exercise or two to the whole routine. But don't have just one girl make it up and then teach the others. I hope that helps!