Personalized Believe In Leprechauns Youth T-Shirt. St. Patrick's Day Youth T-Shirt - Kelly Green 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. 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.