Personalized Owl 100 Days 3rd Grade Toddler Long Sleeve T-Shirt. Funny 100th Day of School Toddler Long Sleeve Tee - Black for grade school teachers and students with 3 cute owls on a yellow ruler says 100th DAY OF 3RD Grade. 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.