It's beeswax collage -- doesn't it look fun? I've taken some of these classes at A Work of Heart, a wonderful crafts studio in San Jose, CA. If you're local, you really should check it out -- they have excellent workshops and classes.
Another class I went to at the studio was on Zendoodling, which was a really interesting and fun thing to do. Have you seen Zendoodling?
I learned how to do this at Work of Heart, but actually created it in Painter for my Painting with Computers class, an online community college class. [Foothill College, near me, has many online art classes that are great and attract people from all over the world. I'm on my fifth class (Drawing I/II, 2 Dimensional Design, Photoshop, and now Painting with Computers), and I really enjoy them. The teachers set up opportunities to get to know other students online, it's fun to see other students' work, and you can complete your assignments whenever it works for you (before the due date, of course).] So . . . Zendoodling looks very hard, but really, it's dead easy. When I looked at what we were doing in the workshop, I thought, oh I can never do *that*, but when the teacher showed us step-by-step, it was very easy. You just build up one piece at a time. It takes time, but it's one of those things you can do while you're watching TV (are you like me? I can't watch TV without doing something else). You can google Zendoodling (or Zentangle, which is a copyrighted brand) and come up with all kinds of stuff.
Have you tried either Zendoodling or beeswax collage? If you have, I'd love to see what you've done. Have a great day!