Personalized Happy 100 Days Of School Baby Bodysuit. Whether your child is marking their 100th day at school or you're a teacher looking for a fun way to commemorate this milestone, our 100 Days of School Apparel is the ideal choice. Our one piece baby bodysuit make great gift for newborns, babies, infants, baby showers and expectant moms. An ideal gift for any new parent who will want one in every color.