For example: body riddles (male gestures, female guesses), self-report of self-employment (exposure to new media) (which also allows teachers to find problems and explain them to students), word solitaire, balloon squeezing (men and women holding balloons), playing cards with flour, etc.
Because of class activities, the free space may not be too big. All the above games can be played by some students, and the rest can be used to enliven the audience.