Personalized Unicorn Kitty 3rd Birthday Toddler Long Sleeve T-Shirt. Cute 3rd birthday Toddler Long Sleeve Tee - Black with big polka dot number three, pink flowers and adorable unicorn kitty cat. 3rd birthday gift for girls who love cats. 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.