A CAPTCHA is a "Completely Automated Public Turing Test to tell Computers and Humans Apart." CAPTCHAs are tools used frequently to stop spammers from using computer programs to register for Web accounts or to deface wiki pages with advertisements. CAPTCHAs are most familiar as a picture of garbled or distorted text that humans are asked to decode on a Website. This project uses a new type of CAPTCHA that asks a series of common-sense questions; this new CAPTCHA is accessible to vision-impaired users and seems capable of distinguishing between humans and computers effectively. Most importantly, it allows individuals, in the process of their normal actions, to make easy and constructive contributions to AI research by helping to verify shared common-sense databases.