Put your elbow comfortably on the table and grasp the string at the point where the pendulum is just resting on the center of the circle where the lines cross. Don't consciously move your hand or fingers, just think of movement back and forth in a certain direction. Then think of the object moving in the other directions, then in a circle, and so on. Play with it for a while. Of course, your thoughts aren't moving the object, very tiny imperceptible movements in your hand are.
Most people are impressed.
Another hypnotic experience is extending your arms in front of you and carefully noting that the palms are facing each other at the same height and about two inches apart. Then close your eyes and imagine your right arm is getting heavy while your left arm is getting lighter and lighter. After imagining this for a minute or so, open your eyes and see how far your hands have actually moved. Six inches or more is not unusual but an inch or two makes the point that thoughts influence behavior. Consider some other factors about hypnosis.