Personalized Mimi Grandma Christmas Elf Toddler Long Sleeve T-Shirt. Mimi Elf grandma Christmas holiday Toddler Long Sleeve Tee - Black has striped elf feet design for her, perfect for a party with the grandkids. 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.