Personalized 1st Christmas Reindeer Toddler Long Sleeve T-Shirt. My 1st Christmas! Celebrate baby's 1st Christmas with this cute reindeer. 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.