Editor’s note: The diagrams were updated on January 25, 2023. There was an inaccuracy in step 7. Thanks to Anne LaVin for pointing out an improved method to find the crease.
Here is an origami rabbit from a single sheet of square paper. It is relatively simple, especially for someone who has some experience in folding. For the tail section, instead of simply valley folding it (which is easier), you can also outside reverse fold it.