Plan your meetings around things that your girls are interested in. If your girls are having struggles getting along, take them all to the park, spread out a number of blankets and hold your meeting there. Give each a notepad and a cool pen. Have them write down two lists.
1. Things that help a friendship
2. Things that hurt a friendship
Go through each girls' list one by one (as time allows) and discuss their answers. Then share what the Bible says about friendships. Tell the story of David and Jonathan and perhaps share your own stories of friendships. Don't forget to bring along fun snacks and drinks.