Describe what leisure activities you enjoy on the weekend

This will require you focussing on three main points. The main thing you need to be careful of is accuracy of characters, so stick to simple topics. You'll be amazed by how much you can develop out of one activity. For example:

I like to play tennis. This year, I play tennis with my little brother. After school, my little brother play tennis at 4pm.  

我喜欢打网球。 今年，我和我的小弟弟一起打网球。 下午三点放学后，我和弟弟一起打网球。