Personalized 6th Birthday Childs Kite Toddler Long Sleeve T-Shirt. 6th Birthday Kite design Toddler Long Sleeve Tee - Light Blue has big number 6 as well on this bday party gift for boys and girls. 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.