Personalized St Patricks Day Irish Unicorn Toddler Long Sleeve T-Shirt. Cute little unicorn with striped green and white horn and green mane and tail has Irish St Paddys Day shamrocks. 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.