This is Spirit Week at Jefferson Elementary School, and Thursday was Twin/Triplet Day. Teachers Maddy Demel, left, Brenda Unrein and Jennifer Leiker dressed as the Koo Koo Kangaroo group. The screen behind them shows the original Koo Koo group members on the GoNoodle website. “We use (GoNoodle) for brain breaks during our day,” Unrein said.