“Recreational mathematics is inspired by deep ideas that are hidden in puzzles, games, and other forms of play.” (Robert Vallin, quoted in “Three New SIGMAAs Formed”, by Jacqueline Jensen-Vallin, MAA Focus Vol. 38, No. 2, April/May 2018.) The field of recreational math includes a startling variety of mathematical ideas and strategies, and tends to be especially entertaining and accessible. (And they make wonderful examples and research projects for students!) This session is devoted to talks related to recreational math, in any of its myriad forms!