Personalized Happy 100 Days Of 3rd Grade | 100 Days Of School Toddler Dress. Celebrate your child's milestone with our Happy 100 Days Of 3rd Grade design! This adorable apparel is specially created to commemorate their 100 days of school. With its cute and cheerful design, it's perfect for showing off their achievement and spreading the joy of learning. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!