Personalized Christmas Mermaid, Antlers, Mistletoe, Xmas Toddler Long Sleeve T-Shirt. Cute, fun and adorable design with Christmas mermaid. Modern and trendy gift, perfect for Christmas or New Year's celebration. 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.