Things You Can Do in 3 Hours` is an article from February 20, 2009, listing various tasks one can accomplish within a three-hour time frame. The post highlights the development of a new feature by Tumblr's team that enables users to post updates on their blogs using their phone numbers and optional PINs. This feature leverages Twilio's API and is showcased as an example of how quickly developers can create innovative solutions. The article also provides links to related resources, including documentation, ebooks, industry reports, webinars, the developer community hub, and code samples.