Have everyone form a circle. Ask a volunteer to write a sentence on a strip of paper. The more difficult the sentence, the more fun the game. Or, start the game with a sentence you have prepared.
The writer gives the written sentence to someone on their right or left. That person reads it quickly, then hands the paper back to the writer and whispers the sentence to the person next to them. The group passes the sentence along, with the writer hearing it last. Compare the final version with the written sentence.