Personalized Las Vegas 16th Birthday Toddler Long Sleeve T-Shirt. Las Vegas sign 16th birthday Toddler Long Sleeve Tee - White says IT'S MY FABULOUS SWEET 16TH BIRTHDAY. 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.