Personalized Sweetest Little Sister Toddler T-Shirt. Who's the sweetest little sister? Cute Toddler T-Shirt - Natural with adorable smiling cupcake with pink frosting and red cherry on top says SWEETEST LITTLE SISTER. 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.