I've always loved to work with clay. It's soothing and relaxing and you can do so much with it. Creative Fabrica has just opened their classroom platform... Take a peek at this class*: How to Make Polymer Clay Slabs
There are quite a few other classes that explore other mediums and you can find them by using the link above and then clicking on classes. If you have an All Access subscription, you can access the classes and all content on Creative Fabrica with your subscription. Purchase a Classes subscription and you'll only have access to the classes. You'll find subscription pricing at this link.
*The link to the class is an affiliate link -- I get a small reward for purchases you make on the website using that link. All proceeds from those purchases are used to purchase gift certificates for challenges on the eclips/SCAL users page on Facebook.