|Polymorhph, as sold, white granules|
When heated to 70 Celsius (or so) it becomes clear, a bit sticky putty that can easily be shaped by hand. There are many ways you could do the heating but I prefer pouring some freshly boiled water atop and let it melt for a while.
|Home made phone-tripod adapter|
Making my own tripod adapter was quite simple: Firstly I covered relevant part of my phone with clear packing tape, so I can be sure the melted pastic don't take too much hold.
|Attached to desktop tripod|
As soon as polymorph was at the desirable shape I pressed it (along my phone) atop of my tripod head, so that plastic got around the 1/4" bolt that's used for fixing the camera, and I let the plastic cool back to room temperature.
The adapter works well, and keeps phone steady for making videos. At the same time: This adapter was/is a quick hack, so there's definitely not much hope winning any industrial design awards with it. ;-)
All in all, I have used Polymorph quite few projects so far and I like the speed I can use it to make the unique objects I need. It's also good for making low temperature molds of existing objects and repairing things.