"I really enjoyed watching you with the kids.  Thanks for supporting [our son] and hosting all the fun!"

"Thank you for all the time and energy you have devoted to nurturing our children in teamwork, good sportsmanship and ball skills.  The positive impact you have had on their self-confidence shows!  You are a natural!"

"You have been a wonderful coach, both in basketball and in life/sportsmanship skills.  Thank you so much!"

"Thank you for your wonderful teaching and nurturing of our kids!  It has meant much to us."

"Your enthusiasm is contagious!"

(I coached my son's basketball team.  These are things the parents said.)