Personalized Happy 100 Days Of Kindergarten | 100 Days Of School Infant Dress. Our Happy 100 Days Of Kindergarten design features vibrant colors and playful elements that capture the joy and excitement of this special occasion. It's a great way to show off your child's achievement and make them feel proud of their progress. They'll love wearing this design to school or any other casual outing. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!