Personalized 3rd Birthday Princess I'm Three Toddler Long Sleeve T-Shirt. 3rd Birthday gift for your little girl who will look so sweet wearing a cute The Princess Is Three crown Toddler Long Sleeve Tee - Pink gift that is perfect for her special third birthday celebration party. 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.