Personalized Born to be a Unicorn Toddler Long Sleeve T-Shirt. Born to be a Unicorn! You're cute, you love rainbows, you sparkle, and you're magical. You're basically a unicorn. 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.