Personalized Pi Day Boys Cutie Pi Math Infant Romper. Daddy's little cutie pi Infant Romper - Black with Pi math symbol in purple for a son. Fun baby shower gift for a math teacher. Meet your new favorite outfit! Keep dressing simple with this one piece, lap shoulder t-romper. Super soft and perfect for baby's sensitive skin. 5.5 oz. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40; Heather is 90/10 combed ringspun cotton/polyester)