Personalized Be A Unicorn Toddler Long Sleeve T-Shirt. In a field of horses, be a unicorn! Stand out from the crowd in your own special way. Embrace your inner 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.