Many people writing to Ripley included their own drawings in the hopes that he would be inspired to use their ideas for a Ripley's Believe It or Not!®. In 1937, young Peanuts creator Charles Schulz was first published when he sent in a cartoon about his dog Sparky's ability to eat pins, tacks, screws and razor blades. Sparky served as the model for Schulz's world-famous cartoon character, Snoopy.