Personalized Math Genius Frog Newborn Layette. A happy green frog holding a banner that reads Math Genius is a humorous gift design for mathematicians, math school teachers and students. 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