Personalized 4th Birthday 4 Year Old Girls Rainbow Star Baby Bodysuit. Cute rainbow starburst with pink number 4 on a Baby Bodysuit - Heather and Navy for celebrating a little girl's 4th birthday. 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.