Personalized This Dad Rocks Youth T-Shirt. This dad rocks text with a happy, dancing rock is a funny gift design for fathers, stepdads and grandfathers on Father's Day, birthdays or holidays. 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.