FIRST CONDITIONAL
One person begins with a sentence, for example
'If I go out tonight, I’ll go to the cinema.' The next person must use the end of the previous sentence to begin their own sentence, for example
'If I go to the cinema, I’ll watch Charlie and the Chocolate Factory.'
The next person could say,
'If I watch Charlie and the Chocolate Factory, I’ll eat lots of chocolate.'
Then,
'If I eat lots of chocolate, I’ll put on weight.'
Also check out my other blog,
Big ESL Ideas for Small Learners