Here's a quick tip to save $80 if you have a kid who will be in the fourth grade this year--the National Parks Service has an "Every Kid in the Park" Program which allows the child (actually the entire family) to receive a free annual National Parks Pass just by signing up here! Note that for this school year, you need to sign up after September 1st but this is a great opportunity since it gets the whole family into national parks when the average per visit entrance fee can be $25!
