Personalized 4th Birthday Dinosaur Toddler Long Sleeve T-Shirt. Grinning green dinosaur is celebrating his fourth birthday! Cute 4th birthday present for the four year old! 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.