Personalized About The Shamrocks Youth T-Shirt. St. Patrick's Day Youth T-Shirt - Kelly Green with shamrocks and confetti says IT'S ALL ABOUT THE SHAMROCKS. Perfect for St. Patrick's Day celebrations and parades or for anyone who loves shamrocks. 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.