Personalized Teaching Rocks Newborn Layette. Teaching rocks text with three dancing rocks holding books on Math, Science and Literature is a humorous design for educators and student teachers at back to school, birthdays, holidays and graduation. 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