First the kids listened to the Bible story of the Annunciation and Visitation; and after talked about what Mary did and how they could imitate her during the Advent season. While the kids colored a cut-out Advent wreath, they came up with ideas on how they could be like our Blessed Mother, using each action of Mary to work on each week of Advent. You could do this at home by finding a printable coloring page like this one or this one, or you could even take more time and make a handprint Advent wreath or a toilet paper tube Advent wreath. Write the kids' intentions for each week on the appropriate candle.
In saying "yes" to God, Mary gave up any plans or hopes she had for her own life, in order to fulfill God's plan. Her sacrifice - then and later - gave us the hope we now have to be with her and her Son in Heaven one day. Sacrifice is a difficult thing to do, as we all found out when this decision took the longest for the kids to decide on. Skipper in particular was not happy about sacrificing anything, but eventually he decided on giving up a favorite toy for the last week of Advent, and letting his brother and sister play with it instead. (This particular toy is one that is often being threatened to go to Goodwill many a time due to the arguments it causes!)
To wrap up the morning, the kids said a decade of the Rosary in honor of the Immaculate Conception and Our Lady of Guadalupe. Then all went home, hopefully with a sense that while we all wish our homes to be well-decorated and lit-up for the season, so too must we "decorate" ourselves within in order to welcome Jesus into our homes.