you draw a picture then you draw another one that is slightly different then another and another. You can then animate it by saving it as a .gif and making sure that the 'animate' box is checked (assuming you are using photoshop)
I do not have a sequence of frames for this anymore... or at least I cannot find them. I did this on a different computer than the one I have now. You can use this for your school project but you will have to give me credit for it! I would also like to see the final product if possible! Hope that helps!