Personalized Pi Day Daddys Little Cutie Pi Newborn Layette. Daddy's little cutie pi Newborn Layette - Light Blue with Pi math symbol in purple for a daughter. Fun baby shower gift for a math teacher. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months