Personalized Happy 100 Days Of School Infant Dress. Celebrate the milestone of the 100th day of school with our Happy 100 days of school design! This adorable outfit is perfect for kids who are looking for a special outfit to mark this special occasion. With its cute design, it will make your little one stand out and feel proud on their 100th day of school. It also makes a thoughtful gift for a female teacher to commemorate this milestone in their career. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!