Supporting the communication, language, and literacy development of children with complex communication needs: State of the science and future research priorities J Light, D McNaughton Assistive Technology 24 (1), 34-44, 2012
Cool beans is a curious phrase that uses nonsense to bring humor into a joyful exclamation. It originated in American pop culture during the late 1960s. Slang of this time is known to center around illogical phrasings of words, and cool beans is among the most durable lengthy late 60's era terms. It is used when referring to something with a positive connotation, for example, That party was cool beans..
Answer Wiki. The common bean appears to be Mesoamerican in origin, on the slopes of the western Andes (around Ecuador and Peru). (Page on pnas.org) The common bean then spread from this area to the rest of South America and up to Central and North America. Broad beans (favas) are native to North Africa and Southwest Asia and spread from there.