Have the kids do a mitten matching game. Make paper mittens, or if you have enough lying around, real ones! Tape up on the board to string them on a line. Many cute ways to do this.
Ways to implement the game;
1. The child who makes the match gets to lead the song with mittens on (lead alongside you, of course).
2. The matching mittens are a song to sing.
3. The matching mittens are a way to sing (to review a song over and over again).