Personalized 4th Birthday Dragon Toddler Long Sleeve T-Shirt. I'm 4. A cute dragon puffs pink smoke to let the world know it's 4th birthday is here! Great gift 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.