This shows how to use an ordinary set of pliers as a hobby clamp (in a pinch anyway).
Ultimately I believe this is worthy of winning a random prize in the tool tip contest.
Step 1: Get your materials
You will need a pair of pliers and a strong elastic band. I took my band from a bunch of broccoli, so it was FREE.
Make sure your rubber band is strong or it won't have the strength to clamp very well.
Step 2: Attach Rubber Band to Pliers
Put the rubber band over the handles of the pliers. You may need to move them up or down the length of the handles for the best grip.
It generally depends on the strength and size of your rubber band.
Step 3: Clamp Stuff
These are not extremely strong clamps but they are useful for hobby work and for keeping your hands free during long holds with a pair of pliers.
You can see how they can grip even small items like finishing nails.