Personalized Cordelia and Birds Believe in Yourself Toddler T-Shirt. If you believe in yourself, you can achieve whatever you set your mind to. Cordelia and Birds Believe in Yourself Toddler T-Shirt - Natural, from the children's book "Cordelia" by Michelle Nelson-Schmidt. 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.