We are driving from southwest Missouri to the Outer Banks of North Carolina this weekend and can't decide whether to take the northern route across I-64 or the southern route across I-40. Any fun places for children along either route -- just to let them run around for an hour or two? We will leave either Thursday evening or early Friday morning and would like to be within 7-8 hours of NC by Friday night. Don't mind driving 10-12 hours in a day. Any suggestions? Thanks!