• Travel bingo is as old as, well, probably travel or bingo. Bring your version into the 21st century with one of the different travel bingo apps. There's State Plate Bingo ($1.99), where you check off various state license plates as you see them, learning a few state facts along the way. Or try more traditional Travel Bingo ($0.99), which requires you to check off various road signs, animals or vehicles to get a bingo.
• If you're looking for a kid-friendly place to pass an hour or two, check out Mom Maps (free). With an extensive list of parks, indoor play areas, restaurants, museums and more, you'll be able to find an activity in the area in no time.
• Kids bouncing off the walls? Find a playground in the area with, of course, Playgrounds! (free). This app, brought to you by Parents Magazine and KaBOOM!, will not only locate a playground near you, you will be able to see user-uploaded photos of the space and read reviews and ratings. Michelle Obama already uploaded a photo of KaBOOM's 2000th playground after it opened.
• We've already given you an intro to geocaching, but if you haven't yet tried it, you might want to give it a go on your next trip with Geocaching ($9.99 for full app; free for intro app). Finding a cache in a different city makes the experience that much more exciting, and all you need to start hunting is the introductory app.
• Heading to a major theme park? Look for an app that will tell you the wait times for various rides. There's one for Disneyland, Disneyworld parks, and Universal Studios already, and they are all free. Search your app store for the park you need.
• Do people send postcards anymore? Now you can send one directly from your iPhone with photo you've taken yourself. Snap Shot Postcard (free) allows you to upload your photo and write your message, and they will print it and mail it off in the real snail mail.
Do you have a favorite travel app? Let us know in the comments!