Lightsaber reading

I had an idea a couple months ago about taking a chopstick or other pointer and attaching an LED circuit with a push button to make a more interesting pointer for reading.  It turns out that the dollar store and the interventions of the grandparents did this for me by getting my son a bunch of cheap key chain light sabers, although it took me about a month to realize their true potential.  Using this yesterday he was pointing at the words and read a book pretty much entirely himself (a Biscuit book, which are pretty simple and a lot of them he has partially memorized).  This was a somewhat arbitrary step that I had been waiting for.  He has no problem sounding out new words if they are on a card but when he looks at sentences he has a tendency to say "this is too hard, you read it".  With the light saber he is able to focus more easily on the word at hand.

In programming news, I can't remember if I already mentioned this in the last post but I was trying to make a physiologically accurate simulation of a person.  The problem is that this is too complex and I'm stuck with a basic model that can't even get oxygen delivery (DO2) correctly modeled compared to real experimental data.  Plus after discussing via email with the author of some renal physiology papers (thank you Dr. Bengt Redfors) there are still too many unknowns on what even causes something as "simple" as hypoperfusion related AKI. 

Currently I am just working on better understanding the basics of flask, so that I can apply this to a project in the future.