I’ve never posted on a blog before so I could be a bit too bland...Astro Jacks are basically a string with one ball attached to each end and one free ball in the middle. So first you start moving one of the balls on the side up and down. Then the free middle ball (which I’m holding in the picture)stays in one place while the other ball spins around it.Well, I like Astro Jacks because when you move your hand up it makes the orbiting ball go farther away from the ball its orbiting. And its soo awesome how they are so unpredictable!!!