Anyone can create a drawing animation

Anyone with an iPad can easily create an animated drawing. Looking for inspiration for lesson plans?  Or, a way to make even showing your math work more interesting? Here is an example of an animated drawing of a cell made entirely in Pages (4 second long video):

Here is a picture you can trace:

To animate, tap on the paintbrush icon at top right (make sure your drawing is selected first). Here is a screenshot: