Try looking at Star-Spangled Crafts by Kathy Ross or Independence Day: Birthday of the United States by Elaine Landau for some inspiration.
To further spark your patriotic creativity, while you are surfing the internet, take a look at Fourth of July Arts and Crafts Ideas for Kids where you will find many unique projects to choose from.
While you are enjoying the holiday, don't forget to watch the Des Plaines parade, and go to the ice cream social and fireworks on July 4th. You can check out more information on where to be at the City of Des Plaines website.
Have Fun Preparing for the 4th! Enjoy the festivities!