Joker asks participants to write a sentence using just one word.
Compare results. (No need to split hairs over the definition of a sentence, the purpose is to play with language.)
Joker then asks for two-word sentences.
And so on, one, two three, five, ten words, then jump to twenty, fifty, one hundred-word sentences.
Have people find examples of each, feeling free to use poetry, lyrics, any text.
Play the same game additively, start with one word, add another, and another.