Personalized Happy 100 Days Of First Grade Infant Dress. The Happy 100 Days Of First Grade design is specifically made for 1st-grade students, adding an extra touch of joy and pride to their big day. With its vibrant colors and adorable illustration, this design is sure to bring a smile to everyone's face. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!