Personalized French Mardi Gras Youth T-Shirt. Youth T-Shirt - Kelly Green with Mardi Gras slogan LET THE GOOD TIMES ROLL in French. LAISSEZ LES BONS TEMPS ROULER. Harlequin argyle fluer de lis in purple, green and yellow. Perfect for Fat Tuesday! 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.