Even if you work first with materials, your final outcome may not be a material one. Today, you have plenty of online available and free tools which can help you to transform a small series of sequential images into animated movies or GIF files.
You can create small visuals stories on the computer but also with your smartphone by simply taking images. Let's see a few examples!
This small animated movie has been made by the ancient technique of paper cuts. They were moved step by step and one by one and we took a photo of each movement. Then the images were edited simply by putting one after the other.
Here is another way to create animation, based on the same principle of putting together subsequent images. But here the animation was created by erasing the text step by step. Then images were put together in inverted order to make the text appear gradually.