Personalized Owl 100 Days Pre-K Newborn Layette. Funny 100th Day of School Newborn Layette - White for Pre-K teachers and students with 3 cute owls on a yellow ruler says 100th DAY OF PRESCHOOL. Celebrate being 100 days smarter. 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