Personalized Duncan Tartan Unicorn Toddler Long Sleeve T-Shirt. A rearing unicorn filled with the Duncan clan tartan, wrapped in a banner with the family name. 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.