I am needing some ideas for common threads in the below short stories. We are studying Bradbury right now and I have a big paper due soon. It can be a common thread for 2/5 or 3/5 of the stories, so it doesn't have to be common to every story.

Please help me with some ideas here as I have read all the stories but am not real sure what to talk about in my papers.

thanks for any input ! (5 Stories below)

A Flying Machine
A Blade of Grass
Time in thy Flight
The Pedestrian
The Garbage Collector

I can see one immediately: they're all about beings (people or robots) with unconventional, not generally accepted ideas. They deal with the rebellion of the individual against conventional thinking and some of its consequences.

Thanks for the input. If anyone else can help please feel free to do so!

Really need some others comments if you could find some common threads between ether 2 or 3 or the stories. Very wide open, please help me out here.