To facilitate the choice of balls to that we recommend you use with these Poi we have added the most popular choices as options below. The optimal weight depends on the height of the player and the desired rotation speed. Heavier balls will result in longer more controlled spinning and lighter balls for faster spinning and quicker changes of patterns. As a rule of thumb, we highly recommend the HSGB model which is a knitted sack filled with small plastic pellets. These balls give an optimum weight for all round poi movements. As they also have an LED system built in to glow in the dark using batteries but as they are old stock this function in many cases no longer works so they are no longer sold as such which is reflected in the price being cheaper than standard juggling balls.