Every kid in in 4th grade gets a free pass to any national park if you register on everykidinapark.gov NO KIDDING!! I learned of this on public radio and then checked it out. WOW! Nice!
I happen to have two boys 3rd and 4th grade, so it looks like I can get a free pass next year too! I looked at the fine print & it looks like the pass also includes the 4th grader and all other children under 16 with the 4th grader and up to three adults. If a national park / site has a parking / car fee, it includes all the children under 16 and up to three adults that are all in one passenger car. Since we are planning a trip to the Badlands, SD, Mt. Rushmore, and Yellowstone this summer, this pass will come in handy! I already printed mine!