Meeting 3 of the Working Group on Play, Evolution, and Sociality. (Back row, L to R): M. Mangel, H. Fouts, B. O’Meara, G. Burghardt, B. Smuts, K. Lewis Graham, G. Cordoni, M. Rehakova, E. Palagi, P. Hammerstein. (Front row, L to R): S. Pellis, J. Auerbach. Not pictured: J. Schank, E. Akcay