Drawing your hand
Put your hand on a cardboard sheet and mark its perimeter with a pen. Then, cut it with scissors
Articulating the hand
Make little holes in the cardboard: one hole at the end of each finger, a pair of holes at the middle, and another pair of holes at the parte of the finger that joins the hand. Then, pass the thread through the holes.
Attaching the servo
Take all the threads and knot together to the servo arm. Be sure the servo arm will oscillate from the nearest position respect the fingers to the opposite one
Glue a wood stick to the hand and fix the servo and the other littlebits to it