Personalized 99 Problems Grandpa Youth T-Shirt. Funny Youth T-Shirt - White for Grandpa says I'VE GOT 99 PROBLEMS BUT BEING A GRANDPA AIN'T ONE. Distressed text. Funny Father's Day gifts for Grandpa, Granddad and Papa. 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.