A reminder for us all of what the day means:
You can find a nice readable copy of the Declaration of Independence here.
John Adams said he hoped future generations would read it aloud every Fourth of July. We've been doing that, and once the kids got used to the archaic usage and spelling, it became a fun tradition. Try it!
Print out a few copies and leave them around during your barbecues. It'll help people remember why we celebrate the day.