Free stuff makes me happy and Crazy Mouth Lite might just be the funniest most useless app on the App Store right now. I know that's a bold statement, especially coming from a lover of useless things, but I mean it. 

As you might have guessed, Crazy Mouth Lite is a free app that provides you with two "crazy mouths" to don for your friends. It's simple but funny. All you have to do is press the mouth you want to use, rotate the iPhone in front of your face and then let the amusement begin. 

Okay, so it's not hilarious, but I'll tell you the whistling face had me cracking up pretty good. I especially love how it darts all over the screen. Makes for a funny effect. Plus, the sound quality is great to amp up the guffaws. 

Now, if you're willing to shell out $.99 you can get Crazy Mouth with 10 different mouths. While I find the two free ones entertaining, I'm not sure that I'm willing to spend even a dollar on more. There's also a Crazy Eye app you might want to check out. 

And be sure to press the question mark to see the app in action. That kid is having fun.