Grammar in English - A Fun Activity

Soyit's a fun activity. It obliges you to think of the structure ofof what you're partners up to. Sut really, really, really tunes your mind in on grammar structure. The other class members or group members help to correct the grammar andt h structure of the sentences. Or say something which isn't incorrect, but just unexpected. Do you know this activity? Have you seen this before? Something similar isay, i know this one.