Program created with Scratch, an application development platform created at the Massachusetts Institute of Technology (MIT); contains Scratch programming language code used for creating stories, small games, and animations; contents of the file include sprites, scripts, costumes, and sounds; replaces the original Scratch .SB file. To create a SB2 file: Open the "Scratch Project Editor" on the MIT Scratch page. Create your animations and select File ? Download to your computer in the browser mac. Name your file, choose the save location, and click Save. NOTE: A Scratch project may be compiled as a Java archive (.JAR file), which can be run in a Web browser.