The Planetary Society has partnered with the U.S. National Park Service to create an Junior Ranger Eclipse Explorer activity book.
You can download the PDF for free of the book. It is pretty colorful so you may want to print it in black and white.
If you have classes tomorrow (Monday, August 21st) you might want to consider that as an activity for the day. Parents can then take their child to the nearest National Park to get their badge for completing the activities in the book.
Definitely call ahead though to make sure they have badges. The program is only offered at NATIONAL parks not STATE ones (I called our State Park without thinking but they pointed me in the right direction).