Personalized 100 Days Of School 100 Days Of Cool Toddler Dress. Celebrate your child's milestone with our adorable "100 Days Of School 100 Days Of Cool" design apparel. This cute and happy design is the perfect way to commemorate your little one's first 100 days of school. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!