If you've ever wanted to add puff balls of yarn to things, here's how. Some examples of potential applications are shown in the first couple of slides. Bunnies need tails, of course, but some or your winter hats may also be happier with some puffs.
Step 1: Step 01. Materials
We only need yarn and a can (or some other kind of object to cast the yarn around). As you get more experience, you can use pretty much anything, and will get better at calibrating the radius of the object for the desired puff result.