I Have The A Leap Pad 2 And I'm Trying To Download Songs Using The Mp3 App.

If you have the free MP3 app (did not buy it from the app store), you cannot download songs that you do not get from the app store.  If you did buy the app from the app store, then you can download songs from anywhere on your computer:

First plug the Leap Pad 2 into your computer.

Next, run / open the Leappad Connect program on your computer.

Choose the Leap Pad 2 device.

(I forget if you have to pick which child's account you want to work in at this point.)

In the left side menu there should be an "On this device" option, click it

A list of apps will appear.  Each one will say if it is on the Laep Pad 2 or not.  At the very top of the list will be an item that says something to the effect of "Manage my content / Add ..."  To add MP3s, you click that item/link.

If the MP3 app has not been downloaded onto the Leap Pad 2, you will not have the option to add MP3s.

If the MP3 app is downloaded onto the Leap Pad 2, you are in the right spot to add songs from your computer to the Leap Pad 2.  Browse your computer for any songs you want to add to your child's Leap Pad 2, and add them.

Once you're done choosing songs, you'll need to sync / download them to the Leap Pad 2. (As I don't have my computer in front of me, I can't write out the steps for this now)