Thunder Basketball Thunder Basketball is our in-house, recreational basketball league for boys and girls from 1-6th grade. All games are played at the Richard Kane YMCA. Registers: Oct Play: Nov-Feb (1st - 6th grade) Age Divisions: By grade: 1st (Co-Ed) 2nd (Co-Ed) 3rd and 4th Boys 3rd and 4th Girls 5th and 6th Boys 5th and 6th Girls