Step 1: Making Your Handcuffs
First you will need a rope. I advise against using a anything that can't hold the below shape.
Step 2: Tieing the Knot
Step 3: Next
Step 4: Almost done
This same thing can be used on the legs as well so that they can't use there arms and legs. If you do this I find it amusing to stick grass in there ear and watch them squirm.