According to the speaker in "invictus," what is the most important thing for people to control?
a.
their attitude
b.
others' actions
c.
their sense of humor
d.
illness and death

Your answer would be A. Their attitude 

Instead of "to get kids used to how to use a computer", you should change it to something like "to teach kids how to use a computer", After the word computer, I recommend that you start a new sentence, like this "...how to use a computer. They would also use video games...". After the word "Overall", you should add a comma.