GeoCards USA are 5 Card Games in One That Make Geography Fun! 50 Jumbo Sized Cards (4.5" x 6.0") with states on one side and capitals on the other. GeoCards also have population, land area information for each state, and rules for five different games.
The 4.5x6 inch cards are perfect for little hands, and my kids actually fight over who gets to quiz who with the state capitals. We've played three of the five games already tonight, and the population data on the back has sparked some surprisingly deep arguments about why Wyoming is so empty.
These jumbo cards are a lifesaver for road trips; my kids actually fight over who gets to quiz who with the state capitals. The 4.5x6 inch size makes them easy to handle in the car, and I love that the population data is right there for extra learning.