The bones of a frog, viewed through x-ray; revealing a healing fracture on one of the hind legs. Photoprint from radiograph… https://www.rawpixel.com/image/13960736/photo-image-cartoon-person-artFree Image from public domain licenseChild's painting, Arthurdale, West Virginia. Sourced from the Library of Congress. https://www.rawpixel.com/image/12255760/photo-image-face-paper-frameFree Image from public domain license