1. Aluminum Grape spiral
What I found interesting about this material is that it can be resized easily. It can be integrated into an interactive piece. Last week I encountered one of the pieces of Heinz Mack at the Sperone Westwater gallery that reminded of this material.
2. Samples of Italian leather
3. Conductive sponge looking metal
I forgot the name of this material but it is highly conductive plus aesthetically pleasing.