What you need:
Construction paper: Red/white and blue. Or whatever colors your flag calls for (I do not mean to offend anyone by this flag)
Scissors (always supervise your child)
First fold blue piece in quarters. Let your kid cut along the folded edge to get quarter piece.
Fold the red paper in accordion formation across til the end. Again, let your kid cut the length of the strip of paper.
Glue the red stripes on to the white piece of construction paper. I know this isn't an exact replica, but your child, depending on their age, can do how many ever stripes they want to make more real or unreal.
Next have your kid draw their design on the blue quarter piece. My daughter had so much fun making the stars and even labeled one star after each of her family members Daddy, Mommy and her star.
Then, glue the blue quarter piece on top left side.
Let dry a bit and then glue on the paint stick. We just happened to find one that was already brown, because my husband just used it to paint something brown. He got a huge kick out of the fact that we saw it outside and used it for our craft.
Done. The best part of this was finding that paint stick, again using our creativity and recycling at the same time!