I will teach you to put a folder inside of another folder. Butt it only works on iOS 7
Step 1: How To
First you have to hold the folder that you want to put inside another one so the icons shake but just after you touch the screen you have to double tap the home button to get to multitasking. it should look like this.
Then without tapping anything but the folder you would like to put the folder into.
Then you drag the folder (which should still be there on the screen) to inside of the folder.