Personalized Sailing 100 Days 3rd Grade Toddler Long Sleeve T-Shirt. Funny 100th Day of School Toddler Long Sleeve Tee - Black for 3rd grade, primary school teachers with sailboat and stars. My Kids Sailed Through 100 Days of 3rd Grade. Celebrate your students 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.