Personalized Teacher Shamrocks Toddler Long Sleeve T-Shirt. Teacher text with an array of shamrocks is a unique design for teachers at 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.