Personalized Leprechaun In Training Toddler Long Sleeve T-Shirt. Cute St. Patrick's Day Toddler Long Sleeve Tee - White with a green leprechaun's top hat and shamrocks says LEPRECHAUN IN TRAINING. Perfect for proud Irish lads and lasses on St. Paddy's St. Patty's Day. 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.