Personalized Twins 1st Christmas Bird Toddler Long Sleeve T-Shirt. 1st Christmas twin boys or girls Toddler Long Sleeve Tee - White with holiday birds is also perfect for a couple celebrating their first Christmas together. 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.