Okay kiddo, so imagine you're grown up and you work on an airplane, but you're not a pilot or a flight attendant - you're what they call a "crew member." When you get to your destination airport after your flight, you might need to get to the hotel or the next flight you have to work on. But wait, you can't just take any old car in the airport parking lot - you need a special car just for crew members called a "crew car."
Crew cars are usually vans or minivans that can fit several crew members and their luggage. They're provided by the airline or airport just for the crew to use, and they usually have some rules like only being allowed to drive within a certain area or for a certain amount of time. The crew car is an important part of making sure that the hardworking crew members can get around safely and comfortably while they're doing their jobs.