Rock Scissors Paper hand game depiction. Images remixed from openclipart.org: hands and paper by Francesco 'Architetto' Rollandin, scissors by nicubunu, stone by Angelo_Gemmi
This is clipart converted and broken apart that has been released into the public domain because the document says so, and its from NASA, a USA government agency. The publication is called "The Brain in Space:"
http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/The.Brain.in.Space.html