I have also tried a warm-up activity that I've used in the past called "follow the leader", which is a great way for students to individually lead the group in a favorite stretch, dance, or exercise. The entire class spreads out in a large circle, and one student starts in the middle. The student in the middle demonstrates a move, and everyone else follows along. On the whistle, the student in the middle high fives a new students with their hand up, switching jobs. When classes are focused, this goes really well!!
I hope that all families have a fantastic holiday season, take care!!