Personalized Kindergarten Rocks Toddler Long Sleeve T-Shirt. Back to school Toddler Long Sleeve Tee - White says KINDERGARTEN ROCKS in colorful primary colors. Keepsake and photo op gifts for kindergartners first day of school or kindergarten teachers. 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.