Personalized 4th Birthday Dinosaur Party 4 Year Old Toddler Long Sleeve T-Shirt. childs adorable 4th birthday dinosaur holding a balloon with number 4 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.