Personalized Underestimate Old Man Surfboard Toddler T-Shirt. Funny retired surfer Toddler T-Shirt - Heather with surfboard. Never Underestimate An Old Man On A Surfboard. Great gag birthday or retirement gift. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.