Personalized Fitness Fanatic Workout Exercise Toddler T-Shirt. Fitness fanatic Toddler T-Shirt - Charcoal outfit for anyone who enjoys a trip to the gym for a serious bit of exercise and a good time working out. 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.