This activity will work best if you ask two or three people in advance and are ready with something yourself.
In Psalm 34 it says “I will extol the Lord at all times, his praise will always be on my lips”
Invite people to share something that they are thankful to God for from the past week. Let the people you’ve picked in advance go first if that will help to give other people a chance to think.
Close with a prayer of thanksgiving.