Personalized Daddy's Sweetheart Toddler T-Shirt. Toddler T-Shirt - Heather and Royal with lots of hearts and pretty pink text that says DADDY'S LITTLE SWEETHEART. Perfect for Valentine's Day. 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.