You can have as many people as you want, but you may want to stick with a small group of people, since the more people you have, the longer it takes to pass around the sentence.
Idioms and figures of speech are fairly common and can become quite funny. Nonsensical sentences can spurn some great lines. You can also look at messages that YouTubers have received. Many popular YouTubers who have done the Whisper Challenge have used social media (such as Twitter) to ask their followers for phrases for the Challenge. Or, if you have a substantial social media following, ask your followers on your own!
The person who is saying the phrase can take off their headphones while they’re saying the phrase, but everyone else should have their headphones on. Noise-canceling headphones are best for this challenge, but they’re not a necessity. You’ll have to turn the music up louder if you don’t have them, though.
You may want to set a limit on how many times a person can ask you to repeat the phrase, to make sure that you don’t get stuck on the same people for too long.
The person who originally said the sentence can also repeat what the original sentence was, to display how garbled the sentence became.
