Get the free interactive London app for iPhone, iPod touch and iPad, created by the Museum of London. Streetmuseum works by connecting the present day street scene to hundreds of historic images of the city. In addition to viewing old photos of the location that you are touring, you can also read about the history of each site. Download the app before your flight and get to know the city before you land which will make it easier to get around and plan your activities. You can play a game with kids to keep them entertained during the flight. Look up the area surrounding the hotel and point out familiar landmarks. Once you land, you can continue the game and use the app to explore the city hands-on.