Personalized Herpetology Is Ribbiting Toddler T-Shirt. Herpetology is ribbiting text with the word ribbiting replacing the word riveting and a happy frog is a funny gift design for scientists, teachers and school students engrossed in the study of amphibians. 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.