Personalized PawPaw Grandpa's Little Cowboy Youth T-Shirt. Pawpaw Grandpa's Little Cowboy Youth T-Shirt - White has little boy on a horse for a grandson. 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.