You need some toys or random stuff and papers and pens. Put toys on top of the paper in a scene. Draw more action on the paper. Continue your story by moving your toys and drawing some more. Take a new paper if you need one.
In the photo Snork from Moomin stories has gone skating. While doing an epic trick he got’s bright sun bothering his vision and falls into bushes and says “Outch”. Moominpappa rushes in to help saying “Oh no, did it hurt?”
PS. You can take pictures on every scene and make a collage with your phone. Or make an animation with free app called Stop motion studio.