As well as weights, light objects that move can be hung from balls. A London top has experimented with dangling a spherical jumping toy from Toys R Us in a string bag attached to ball bindings or parachute. He also speculates about experimenting with an inflatable blood pressure cuff, and suggests putting gravel inside the elastic bandages to add abrasion to the repertoire of ball techniques. Toys for beating need to be fairly light and delicate. An ordinary pencil is quite adequate, especially for rapid light strokes on a well-secured ball.
Some people use a small, soft cat o'nine tails called a ball whip.
Other specialist techniques could be applied to the balls. See elastrators, electricity, play piercing, shaving. When you're playing with anyone new, always start out lightly with any kind of stimulation to the balls and increase the intensity gradually. Probably the single most important danger signal in this area is intense and often rapidly increasing pain, so the bottom must be able to let the top know unmistakably when he's had enough. In the vast majority of cases, a bottom whose consciousness is not dulled by alcohol or drugs will have no difficulty in distinguishing between a level of pain that is erotically stimulating and pain that signals real damage.