I agree with discussion being best. If you want some written work, you could do side projects like, write a letter to one of the characters, write about/draw gift ideas for one of/all of the characters, writing a letter to the author.
I'm not a fan of short summaries. Similar writing activities that focus on a much deeper skill set could include logging inferences, cause and effect relationships, personal connections to the text, keeping a log of questions that the text makes you think about, a log of interesting phrases or words that your child may want to adopt in her usual speech, etc.