Personalized Happy 100th Days Of School Toddler Dress. Celebrate a major milestone with our Happy 100th Days Of School apparel! Designed specifically for this special occasion, our cute and cheerful 100 Days Of School design will add a touch of joy to your celebration. Whether you're a student, teacher, or proud parent, our apparel is perfect for commemorating this milestone in style. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!