Personalized World’s Best Fitness Coach Daddy Baby Bodysuit. My Daddy is the World’s Best Fitness Coach Baby Bodysuit - Heather & Smoke w/ Ears has cute world’s best design with slogan for the son or daughter of a Fitness Coach. Our unisex one piece baby bodysuit make great gift for newborns, babies, infants, baby showers and expectant moms. An ideal gift for any new parent who will want one in every color.