The Advent Prayer Grab Bag

Traditional Advent activities include Advent wreaths, calendars, and Jesse trees. While these are all great ways to help children celebrate the season, I like using something different: the Advent prayer grab bag.
The prayer grab bag takes its inspiration from the popular party game of grab bags. I ask my group if anyone has ever participated in a grab bag and invite someone who has to explain the tradition of bringing one gift to a group event and then having the opportunity to choose and go home with a gift someone else brought. There are many variations on how to run a grab bag, but those details aren’t important for this activity.
After we’re clear on what a grab bag is, I tell the group we’re going to have one for our classroom, but with a twist. Instead of bringing material gifts for each other, we’ll be pulling prayer intentions and praying for each other throughout Advent. This is a multi-week activity, and to get us started, I come with a gift bag filled with purple slips of paper, each with a prayer intention. By starting with pre-written intentions, the children get an idea of how to write an intercessory prayer. Some of the intentions I have used include:
I invite each student to choose one piece of paper from the bag and then keep that intention in prayer throughout that week. Then we take a few moments to write intentions for the next week’s grab bag. I collect those intentions and add them to the bag for the next session. We start this activity on the last session before Advent and keep pulling prayers from the grab bag until we break for Christmas. The grab bag is kept on our prayer table through the season.
A few hints from my experience using this activity:
This activity fits in easily with whatever the assigned lesson of the day and is a simple lesson on the gift of prayer and how that’s one gift we can give to all people.
Have you done any Advent activities other than the traditional Advent wreaths, calendars, and Jesse trees? How do you bring young people to a better understanding of Advent?