Swimmers
6 & under: swim 25-yds events only
7 & 8's: swim 25 yds, plus 100-yard I.M. events
9 & 10's: swim 50 yds, plus 100-yard I.M. events
11 & 12's: swim 50 yds, plus 100-yard I.M. events
13 & 14's: swim 50 yds, plus 100-yard I.M. events
15 thru 18: swim 50 or 100 yds all strokes, plus 100-yd I.M. events