A New Way to Enjoy Yellowstone & Grand Teton with Your Family. They are two of America’s most beloved national parks, and now you can make visiting them even better. Give your kids the Yellowstone & Grand Teton Activity Book by Paula Ellis and Shane Nitzsche for hours of fun! From mazes and word finds to maps and park-related illustrations to color, there are engaging activities for children of all ages. It’s a great way to learn about Yellowstone National Park and Grand Teton National Park and is ideal for car rides and quiet time.