The New England Sci-Tech (NEST), a non-profit STEM education center (16 Tech Circle, off Route 9 in Natick), will have a Yard Sale on November 20, 8AM-Noon. Proceeds will support the development of NEST’s youth programs and curriculum. Items to be sold include about 800 pounds of surplus electronics plus STEM education kits, books, one-of-a-kind antique/historic items, and all sorts of other stuff.