Posted on October 30, 2016October 30, 2016 by Ben SumnerThe Sumner Family Cookie Monster Halloween Costume My mother made this costume in the late 1970s and we’re still using it. Ben. 1978. Ben. 1978. Ben. 1979. Dan. 1982. Dan. 1984. Zach. 1985. Ryan. 2013. Lilly. 2013. Henry. 2016. Up next: Noah.