Personalized Teacher Three Shamrocks Youth T-Shirt. Teacher text with three shamrocks is a unique gift idea for your favorite teacher at birthdays, holidays, back to school and St. Patrick'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.