Personalized Owl 100 Days Pre-K Toddler Long Sleeve T-Shirt. Funny 100th Day of School Toddler Long Sleeve Tee - Black for Pre-K teachers and students with 3 cute owls on a yellow ruler says 100th DAY OF PRESCHOOL. Celebrate being 100 days smarter. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.