I would suggest starting one of the following for four girls:
***1) Archconfraternity of Blessed Imelda Lambertini *** (or a local society based on this) - A Society of prayer and Eucharistic Adoration for young girls and women who have received the sacrament of First Holy Communion. Blessed Imelda is the patron of First Communicants.
They get together for Adoration to pray for the parish and people’s intentions. At special Masses (Easter, Christmas, First Communion, Marian feasts, etc) they dress up in white with a blue sash etc.
Here are some pics
http://materecclesiae.org/gallery/5290_DSC05327B.JPG
catholicstarherald.org/candelmas-at-mater-ecclesiae-in-berlin/
Here’s a small book about Bl Imelda -
tanbooks.com/index.php/saints/patron-saint-of-first-communicants-the-story-of-blessed-imelda-lambertini.html
2) Fiat -
epriest.com/best_practices/view/48
Girls in grades 5 to 12 receive guidance in four areas of formation:
charity
spirituality
culture
vocation
The primary role of Fiat is to have girls spend time with Jesus in the Blessed Sacrament during Eucharistic Holy Hours at the parish. Girls take on the responsibility of scheduled times to adore Our Lord and receive from Fiat formation on how to pray (they learn meditation, contemplation, Lectio Divina, vocal prayer with special emphasis on the Rosary). During their peaceful time of adoration, they pray and intercede for those most in need, especially the elderly, the sick and the young people in their parish.
Besides the scheduled prayer times the girls meet twice a month as a group.
One meeting is a Bible study; the girls study the Gospel for the upcoming week or a particular theme in the Bible so that they may grow in their love for the Word of God and in their friendship with Jesus.
The other meeting is dedicated to a charitable work they perform, a talk by someone on how they can come to understand and live their faith more deeply (e.g., a formation talk on modesty guidelines given by a professional fashion consultant), or a fun and exciting cultural activity (e.g., field trips to art museums, theaters and musical productions, with discussion afterwards).
3) Little Flowers Girl Club -
beholdpublications.com/home/about-our-clubs/little-flowers-girls-club/
4) Little Women Hospitality Club -
beholdpublications.com/home/about-our-clubs/hospitality-club/