The kids did their part, but Mother Nature had the final say in scuttling the annual Christmas Day trip across the Delaware River by George Washington and his troops. Organizers said high winds yesterday prompted cancellation of the reenactment, which usually draws thousands of spectators. Low water levels originally threatened the trip. A non profit organization that teaches boat building to skills to students provided rowboats that could have made it across, but the winds were just too much to stage the event.