Personalized Baby Dinosaur 1st Birthday Toddler Long Sleeve T-Shirt. A cute green baby dinosaur sits next to a purple 1. Adorable gift for the one year old's first 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.