Its super simple and you dont need much to create one!
Step 1: Materials
It helps if you have an ipod or iphone to look at to see how everything works but it is not NEEDED.
To make drawing everything over and over a bit easier, I would suggest finding a picture on google of an iphone or an ipod touch and photoshopping the screen out of it so it gives you free space to draw!
Finaly you need to make enough photocopies for your animation, dont underestimate this, you will need alot.