I recently assisted a resins workshop with Heidi Schwegler at the Oregon College of Art and Craft. Heidi is an amazing teacher and all of the students had a blast exploring techniques and materials, as well as mechanisms.
We worked with tin- and platinum-based silicone molds, water clear and EZ-Flo resins, as well as plaster and concrete. People brought a variety of different materials to mold and create resin pieces from, as well as to embed into their cast materials. Heidi also did demonstrations of a variety of mechanisms that could be embedded or fabricated with the resin/concrete/plaster pieces. It was amazing to explore different materials and techniques. I never thought that I would really like resin, etc., but ended up being really excited about them.
You can see more images on our Flickr Group, The Resin Workshops.