I made a trip across the USA project that they worked on weekly. I made a worksheet for each state which they filled out the typical info (state bird, capital, number of state reps, governors name, etc), but then they researched places they’d like the visit in that state and planned a trip. They would need to find gas via gas buddy, use the gas mileage of the car, find food costs, hotel, mark their trip out on the map (both state and country). I did something similar when I was teaching ps and it was the kids favorite project of the year. They also did mapping of each state using Tail Guide to US Geography and Notgrass’s 50 States.