Your class is headed to Washington DC to visit all the important sites that relate to the United States Government, like the Supreme Court, Congress, and the White House. However, when you arrive at school on the day of your field trip you see your Teacher Mr. Branch crying on the front steps. He explains that the tickets to all the sites are currently locked in the Principal’s field trip box and he just left for a conference!!! No one knows all the combinations and you only have 45 minutes before the bus arrives. If you do not unlock the box you will not be able to go on the trip! Can you and your classmates work together to save the day and the field trip?!?