Personalized Purple T-Rex 1st Birthday Toddler Long Sleeve T-Shirt. A grumpy, purple T-Rex wearing a birthday hat sits and eats a birthday cupcake. Cute 1st birthday gift for your little one 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.