Personalized 1st Birthday Baby Toddler Long Sleeve T-Shirt. Help your child celebrate their birthday in a special way. 1st Birthday Baby Toddler Long Sleeve Tee - White, features a cute infant with a number 1 balloon. 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.