Personalized Irish Shamrock Oval Toddler Long Sleeve T-Shirt. Irish text surrounded by shamrocks is a unique design for the Irish and the Irish at heart for birthdays, holidays, Celtic festivals and St. Patrick'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.