Personalized Senior Year Rocks Toddler Long Sleeve T-Shirt. Senior Year rocks text with three happy rocks holding 12th Grade flags is a funny gift design for parents, high school teachers and students. 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.