Personalized Believe In Leprechauns Toddler Long Sleeve T-Shirt. St. Patrick's Day Toddler Long Sleeve Tee - White with a cute little leprechaun, dressed in a green suit and derby. He smiling because he found the pot of gold at the end of a colorful rainbow and says I BELIEVE IN LEPRECHAUNS. 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.