Here is a link to a site about the History of Flag Day, and much more about our flag.
By the way,
I highly recommend watching the movie 1776 on or around the 4th of July. There is some swearing in it, but it is a delightful musical account of our founding fathers preparing the Declaration of Independence.
Also, for today or the 4th, you could make a flag cake as we do every year. Make a cake (we usually make white cake) in a 9 x 13" pan (or ask me for our recipe that is made in cookie sheets), frost it with a whipped topping, and decorate as a flag using blueberries and sliced strawberries.
