Play the license plate game. You don't have to be in a car to play. You can look at the license plates of parked cars, or those traveling by when you are walking. Children can keep a record of the states whose plates they have seen. They can color in those states on a map and illustrate them with characteristics described on the license plates.
Some states have county names on their plates.
If you live in one of these states, keeping track of the counties could be another interesting variation. Go around your house and look at where everything comes from. Examine the labels of the clothes you wear and think of where your food comes from. Perhaps your climate is too cold for bananas, and the milk is too perishable to travel far. Have your children ask older relatives what their world was like when they were young.