Ask HN: Python (turtle on a USB flash drive)

I'm helping with a 5th grade class and demonstrated Python Turtle a couple of weeks ago.

At this point I would like to set up a small flash drive to run Python and the turtle module (school's computers are locked down). Ideally I could set this up to run on windows, macs and linux although most likely the former are all that the students will have access to.

Am I using the wrong search terms? I've not located information on this. I know that I can set linux to boot off a flash drive. But is it possible to run Python from a flash drive?

Thanks in advance,

John