Personalized Caffeine Powers Activate Toddler T-Shirt. Caffeine Powers Activate! If your super powers take a cup or two (or five) of coffee to show up, then you have caffeine powers! Funny gift for any coffee lover. 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.