Translation of perspicacia

I remember that after highschool I went to study English in New York. First I did not know whether the city was right for me cause I wanted a place where I would not feel lost. However, it was the right choice.
A ten year old kid should not be on Facebook. I would not be too concerned about your boys, because with facebook they can see who is approaching them, that means they can see the profile and social structure of their friends.
My Spanish is weak, and I need to improve it here. But it is very difficult because I have many other things to do. I must take care of my family and my friends and have no time for Spanish.