You've got two black sticks. Attached to one end of each stick is a cord with a fringe. One cord is long, one short. Hold the sticks in one hand, cord ends out. Pull the short cord fringe and it gets longer as the long cord in the other stick gets shorter. Do it again. It looks like the cords are connected where the sticks meet in your hand. The audience figures it out and tells you to separate the sticks. You do and it still works.
I've seen a variety of characters use these to their advantage. A magician had a big lead up story before showing his magic Chinese sticks. A clown was as confused about how it worked as the audience.
It works with weights and how you hold the sticks. It takes a little practice to get the timing right but it's worth it. These are pretty nice in appearance and action. I like them.