Wat can one use when using airplane mode?

I have an ipad2, iphone 3GS, ipod touch ( 4th gen i think no facetime or camera )
am i able to use apps like facebook, games i have downloaded etc?
i'm just curious as to wat i can use while i'm in airplane mode, as it's a little too confusing for me.
with wat other people have said.

When i use face book

No, you can't use them because you won't have any kind of internet connection. "Airplane mode" is a mode used on communications devices to cut off all cellular and data signaling. Once you do that, you can't get anywhere.

You can read a book you might have stored on the ipad, listen to music (if you have it stored on the device), play a game, etc. Anything that has to connect to a network, you can't do.

You will be able to use any apps that don't require any sort of wireless connection, games and music should be fine, but no social network apps or anything like that.
Don't worry about completely powering off your devices during take off and landing, it has been proven that makes no difference to any instrument used in the plane (navigation, speed meter, etc.), however, the radio waves emitted from your device could possibly interfere with these instruments, which is why you must have airplane mode turned on. These rules won't be around for much longer though, as planes are now beginning to have built in Wi-Fi which passengers can access and use for apps such as facebook, twitter, instagram, etc., but of course you have to pay for them, which sucks.
:)

If you were to put your phone in airplane mode right now, you will get exactly the same things you get on the ground as you would in an airplane in airplane mode. Basically you will get whatever came preloaded on your electronics plus whatever you've downloaded.

On the iPhone, Airplane Mode turns off the phone's connection to cellular data networks, the phone app, and other related services. On the iPhone, iPod touch, and iPad, it also turns off Wi-Fi and Bluetooth, if they are turned on.

Airplane mode turns off your wireless data, which means you can't call, text, or use internet. It basically turns your iPhone into an iPod. You can use any of the features on your iPad or iPhone that don't need internet connection. Most games work but Facebook won't. You also may have the option to use the airplane's Wi-Fi, but you have to pay for it.