Personalized Leprechaun In Training Youth T-Shirt. Cute St. Patrick's Day Youth T-Shirt - Kelly Green 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. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.