Personalized St. Patrick's Day Rocks Toddler Long Sleeve T-Shirt. St Patrick's Day Rocks text with three dancing rocks holding shamrocks is a humorous Irish design for St. Paddy's Day. 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.