Personalized Unicorn Exist, Unicorn Silhouette, Cute Unicorn Toddler Long Sleeve T-Shirt. Cute, fun and adorable design with unicorn, stars and text 'Unicorn exist'. Modern and trendy gift, perfect for the unicorn lover in your life. 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.